com. It cost me a thru hike last year. Temperature ratings determine how much a sleeping bag can protect you from the cold. This protocol dictates how mats should be. Similar to EN/ISO ratings for sleeping bags, the ASTM R-value standard ensures an “apples-to-apples” comparison of R-value for the sleeping pad market. R-Value & ASTM Standard for Sleeping Mats Explained Insulation won’t be as important when the weather is warm. A Great First Backpacking Sleeping Pad: WELLAX Ultralight Air Sleeping Pad. For more details, check out the sleep system section of How to Choose a Sleeping Pad or How to Choose a Sleeping Bag. The search function is case specific but not case sensitive. 5 oz (6-foot length) Inflation: 25-40 breaths or comes with Pumpsack Lengths: 66”, 72”, 72”-wide, 77” What we liked: lightweight, great insulation and durability What we didn't like: width A perennial favorite of backpackers, thru-hikers, and bikepackers alike, no list of best. 1. As a rule of thumb mats can be broken down into 3 categories – Summer, 3 Season and Winter: Summer – roughly ASTM F3340-18 R-value 0. CPSC reminds consumers that the safest place for a baby to sleep is in a flat, bare crib. 5 – mats containing moderate levels. From 2020 a New ASTM F3340-18 Standard for Camping Sleeping Pads Ratings, Known as R-Value, Will be Used by Some Leading Brands. Regular price $149. The regular length I. REI and retailers are suggesting an R value of 2-3 as acceptable for 3 season use despite the EN standard for sleeping bag ratings specifying an R=4. This new sleep system data suggests that it’s worth looking at a more-insulated pad if you want your bag to live up to its temperature rating. Buy Now Best ultralight sleeping pads (1 lb. 3, and for just 4 more ounces, the insulated pad has an r-value of 3. Air mattresses, in particular, have to find a way to insulate while remaining lightweight, and this one uses a patented "Triangular Core Matrix," which creates stability. 95 – to $199. Unisex. 5 out of 5 stars. Clean and dry the patch area: Alcohol-based cleaners are quick and easy. Just as sleeping bags are rated for different temperature ranges, sleeping pads are given a R-value to help you understand how insulating they are. Because the insulation value is being used to determine a temperature rating, it is recommended that the sleeping bag be tested with auxiliary products such as clothing. How to Choose Sleeping Pads. For example, if you search “big agnes 4. It doesn't put all of its eggs in one basket; instead, this pad performs decently in all areas. 5cm x 10. That being said, the reality is this pad is completely reasonable considering it accommodates two adults very comfortably and provides a significant amount of warmth. Insulated Air-Filled Sleeping Pad Category Ranking: These ratings are based on the large (25×76) version of the Nemo Tensor Insulated sleeping pad. Sort: Each column can be sorted in ascending or descending order. It was rolled out to consumers in 2020 and all of the major sleeping pad vendors rate their pads based on it. ASTM F3340-18 is a new testing standard that provides R-value ratings for sleeping pads. e. . Body Mapping Technology: Our patented V-shaped design delivers support and comfort no matter how you sleep ; on your side, stomach or back. Compared to the best overall sleeping pad for backpacking, Therm-a-Rest NeoAir XLite NXT, the Rapide SL is 40% less expensive, 52% heavier, 17% thicker, and 7% less warm. Selecting the proper sleeping pad will make a big difference in the way you sleep on your next adventure. $39. 95 Roamer™ Double Insulated Self-Inflating Sleeping PadThe Kelty Cosmic SI Mummy sleeping pad looks a little bulky when compared to an ultralight air mat. 59The REI Camp Bed 3. Head to a blog for an in-depth explanation. Related Posts: ASTM Standard – R-value: Rating Sleeping Pad Insulation; R-value vs. 95. Get ready for a good night's sleep in the wild with the Sea to Summit Camp Plus self-inflating rectangular sleeping pad. Regular: 22. Image: Sea to Summit What R-value sleeping mat should I use in spring/autumn? In mild weather conditions, a sleeping pad with an R-value of 2-4 will suit. 8. It gives you four inches of comfy loft. 8 before it can be used in their test?The Big Agnes Q-Core SLX is an excellent balance of warmth, weight, comfort, and durability. Our 5'5 tester felt like her feet were falling off the end a little. 3 Weight 250g. The testing apparatus and methodology is standardized so consumers can compare the R-values of different sleeping pads or brands to one another. The Cosmic Ultra’s 800-fill down is treated with a PFC-free hydrophobic finish, and its 20-denier nylon shell has a PFC-free DWR to ward off moisture, which made for easy cleanup after a tea spill in the Adirondacks. Head to a blog for an in-depth explanation. You need at least an ASTM R4 sleeping pad (R5 or better preferred) and a 20F ISO minimum rated bag (10F if female using a men's bag). Read honest and unbiased product reviews from our users. INSULATED FOAM: R-Value 10+ foam helps keep body warm. If your chief concern is cost, we recommend the Big Agnes Air Core Ultra. Kymit refuses to submit their pads for testing under ASTM publicize their ASTM pad rating (that's the r-value standard that other pads are tested for), which is why: 1) REI stopped selling them, 2) they are likely much less warm than advertised. If it is not then the maker may have estimated/made up the value. The Comfort Light Insulated sleeping pad is a healthy mix of superb technology that combines lightweight, durable construction, mid-range R-Value, and great pack-ability. What is R-value in ASTM F3340. A COCOON liner adds up to *°C to the temperature rating of your sleeping bag. While Therm-a-Rest has always used R-value to rate our sleeping pads, this new standardization will allow campers to make “like-for-like” comparisons with our competitors pad. Austin Beck-Doss. 0 rating, you’ll have a total R-value of 6. Score: 98 of 100. We stock a great selection of camping and sleeping mats from top brands such as Quechua and Forclaz, and more. This is a good point. With a sleeping pad that means the higher the R-value, the less heat from your body gets sucked through the pad to the cold ground. Designers also removed the metallic reflective heat layers to save weight (and noise). 99. 2"*26"*4. It is important for manufacturers to ensure they understand the relevant standards enforced in their. While Therm-a-Rest has always used R-value to rate our sleeping pads, this new standardization will allow campers to make “like-for-like” comparisons with our competitors pad. The Ether Light XT Air Sleeping Mat is perfect for warm-weather backpackers looking for a quiet, lightweight sleeping pad that offers a. 3 – Insulated AXL Air. Head to a blog for an in-depth explanation. To adjust the temperature, you can remove bedding. K/W ±10%. The very thick sleeping pad weighs less than two pounds, packs small, and is one of. They will be able to find the ideal sleeping pad as a. Foam pads that we tested are warmer (and more comfortable), but not as packable. Type of Pad: Inflatable Air Materials: 30D rip HT Nylon, Polyurethane Thickness: 3 in Weight: 16 oz R-Value: 4. 6 cm) of bump-swallowing loft provides a plush sleeping surface. Best Overall. $249. $99. It also has an internal pump, which is a nifty feature though most testers found it unnecessary. The reason I took off two stars is I think Klymit needs to be clear about their R-value and compatibility of this pad with a top quilt. Head to a blog for an in-depth explanation. Regular Wide: 1 lb. Spar suggests thinking big picture. I tried contacting Klymit for this information but never received a response. Best Budget Camping Mattress: REI Co-op Camp Dreamer XL. 4, while many foam-insulated, self-inflating pads took a hit in the negative. Most women sleep colder than most men, so female campers should consider opting for a pad with a higher R-value. It’s the lighter materials used for backpacking that really raises the price. 4K+ bought in past month. An effective sleeping pad can make you feel too hot if you have excessive bedding. I'd love to see some more columns like fill type, warranty type, etc. 7 (or it used to be R 5/7 BEFORE ASTM F3340 which impacted overall pad R value testing). ProLite. 0 - mats aimed at temperatures no lower than 5C. After over a year of testing, I can now confidently say that this is a 2 season (3 at push) sleeping air mattress. This pad has an R-value of 1. But alongside other self-inflating mats, it’s pretty competitive, and at a push it will still fit nicely in the bottom of a trekking pack. ; Sleep system: Being comfortable at a particular temperature depends on many other variables, especially the R-value of your sleeping. Browse Coleman's top-rated sleeping bags. Head to a blog for an in-depth explanation. REI Co-op Trailmade Self-Inflating Sleeping Pad. 3 oz. Add Ether Light XT Insulated Air Mummy Sleeping Pad to Compare . Your sleeping bag‘s temperature rating is designed to accommodate its max low with a 4. " It is also worth noting that the test also uses a pad but doesn't specify the R-value of the pad. In the last year, the outdoor industry in the US has adopted a standardized way to test the R-values of sleeping pads, called the ASTM (American Society for Testing and Materials) Standard. Head to a blog for an in-depth explanation. 5 (ASTM F3340 Standard). ILD and IFD are used interchangeably in the mattress industry, but IFD is the preferred terminology by the most common standard (ASTM D3574). (223) 223 reviews with an average rating of 4. ASTM F3340-18 is a new testing standard that provides R-value ratings for sleeping pads. It's not a. Klymit Insulated Static-V for $1. Best for. Sleeping Pad R-Value Chart by Temperature ASTM sleeping bag ratings are based on a R=4. Klymaloft Sleeping Pad Review. 4. g. Look for a comfort rating, buy something that’ll be with a comfort rating around the lowest overnight temperatures you expect. 9, but Klymit has somewhat understandably continued to claim a higher R-value based on the idea that a sleeping bag's insulation will backfill some of the "deep welds", which. ILD, or indentation load deflection, measures a foam's firmness. Head to a blog for an in-depth explanation. Their innovative design of this pad allows for a 4. 5 (rated for 4-seasons) Thickness: 3” Weight: 12. Weight: 410g; Size: 51 x 183 x 2cm; Packed size: 51 x 13 x 14cm; ASTM R-Value: 2. EASY INFLATION: Intuitive valve design allows pad to inflate in seconds. 236 Reviews. Our listed R-value is tested and retested, and our final numbers are listed in accordance with the ASTM standard. August 7, 2023. Klymit Gear FAQ. Ultralight and ultra-packable, the Therm-a-Rest NeoAir XLite NXT sleeping pad is quieter, thicker and designed with less bulk than its predecessor while maintaining year-round warmth and versatility. There are other factors which will determine how well a sleeping mat will insulate; but the standardized ASTM R-Value test means that you can compare resistance to heat loss in sleeping pads across different brands. The r-value outcome is based on the amount of energy required to keep the hot plate at a steady temperature; a pad that offers a high level of insulation (i. Outdoor Vitals Ultralight Sleeping pads are available in insulated and non-insulated models to keep you warmer or cooler depending on your adventuring needs. 5 and note that their pads come with the new ASTM R-Value standard so the insulation. ASTM FF3340 Test of R=2. Updated ASTM ratings set the pad back a bitJul 5, 2023 - Learn about the new ASTM standard for sleeping pad testing and what it means for your current and future Therm-a-Rest pad’s R-value. Warmth: Your sleeping pad’s ability to insulate you from the cold ground complements the temperature rating of your sleeping bag or quilt. This chart gives you a full overview of R-Values for all kinds of conditions. Though that number is made worse by companies who released new pads instead of updating their existing products. 11 oz. MondoKing 3D Sleeping Pad Shop. Think of it as the chaise lounge of sleeping pads. If you skimp on your pad's warmth, you should use a warmer sleeping bag and vice versa. An R rating of 4. Feature-wise, the Puma has two large down. Most sleeping pads we sell range from 1. This ultralight and packable sleep mat is designed to reduce heat loss through radiation and convection, giving it an unbeatable warmth-to-weight ratio perfect for lightweight adventures in challenging environments. 8 (RSI 0. Fits in my bivy cover. Standard Test Method for Thermal Resistance of Camping Mattresses Using a Guarded Hot Plate Apparatus F3340-18 ASTM. 4 at REI - FREE SHIPPING With $50 minimum purchase. com. thick REI Co-op Helix Insulated air pad will make you happy twice every trip—first when you carry it on your back and again when you hit it at bedtime. In particular, the R-value testing machine. Dimensions 78 x 30 x 4 in. Yet Incredibly Warm. ) 3 inches. If you find yourself sleeping cold in temperatures where. In the past, the R-value has not had a standardized rating protocol but in January 2020 the ASTM F3340-18 system was introduced. 2 inches Thick, Single 4. Head to a blog for an in-depth explanation. Regular price $39. Over the last 11 years, we purchased and rigorously tested 110 of the best backpacking sleeping bags. Weight: 1 lb 1 oz (477g) Dimensions: Mummy Shaped 72" x 20" x 2. Item #186713. An R-value is a measurement of insulation that measures how much something will resist heat flow. 9, but Klymit has somewhat understandably continued to claim a higher R-value based on the idea that a sleeping bag's insulation will backfill some of the "deep welds", which. Sleeping pads that have R-values of 3 – 5 will be sufficient to keep you comfortable in spring and fall. Thickness: 3 in. Product Update — April 2023. Best overall: REI Co-Op Trailmade Self-Inflating Sleeping Pad. 6 cm thick mat built for comfort. Plus, the sleep space becomes extra breathable when paired with the compatible HALO DreamWeave pad,. Some redeeming features added in to complicate the decision making, but ultimately the low level of comfort offered by this pad overshadows many of the high points, such as its extremely light weight, small. 00 $19. We bring you nine of the comfiest self-inflating sleeping pads of the year, plus one hybrid sleep system and a portable cot. And for that we thank Exped. The pad is one of the thickest on the market, you have 5. Your body will continue to lose heat to the ground, until the ground beneath you reaches thew same temperature, or “thermal equilibrium”. 1. 5 109 Reviews View the 109 reviews with an average rating of 4. Cushy enough for a tent, yet made for 3-season hammock camping, the Kammok Insulated Pongo pad keeps you warm and comfortable as you sleep in cooler weather between 2 trees. Head to a blog for an in-depth explanation. ASTM F3340-18 is a new testing standard that provides R-value ratings for sleeping pads. ASTM F3340-18 is a new testing standard that provides R-value ratings for sleeping pads. Head to a blog for an in-depth explanation. Since January 2020 we have used the industry standard ASTM F3340-18 test to provide R-Values for our mats. If you opened the Tentfloor SLX expecting something the size of a single sleeping pad, you would be a bit frightened. “For winter backpacking and camping, an R-value of 5, or higher, is recommended. 500+ bought in past month. 1. Delivery & Returns Enquiry. Pad Thickness (in. R-Values and Temperature ratings. 7 inch ultra-thick self inflating sleeping mat will keep you off rough ground and insulating the coldness, ensuring maximum comfort and warm for your sleeping at all night. The Zenbivy is made of a removable quilt/bag, left, and pad sleeve/hood. Ionosphere 5 Sleep Mat (550g) £170. . It is now the standard value for comparing warmth across pads. Add To Cart. For anyone who is unfamiliar, “R value” refers to how well a sleeping pad resists, or insulates you against, the cold of the ground. Regular price. 6 to 2, with the exact value varies by measurement. $229. 2 making it suitable for cold weather backpacking and camping use. 1-person. Recently, we have received some emails claiming that there are issues with the sleeping mats they purchased from other low-price sellers. Sleeping Pad Length. 00 Roamer™ Insulated Self-Inflating Sleeping Pad $249. 77 x 27/20 x 3 inches. Since January 1, 2020, we have used the new industry standard ASTM F3340-18 test to provide R-Values for our mats. Read on to find the ideal, less-than-$100 sleeping pad for you. Gender: Unisex. 95 from REI Co-op. 2 R-Value 4 Season Air Mattress, Perfect for Backpacking, Hiking - Lightweight Inflatable & Compact Sleep Pad (Large) at Amazon. Day one, night one. Warmth. The Klymit Insulated Static V Lite is a high-scoring pad that does everything well. They will keep your shoulders and hips off the ground, and keep you warm at night. Keep Reading. So for instance, a sleeping pad with an R-value of 2 is half as insulated as one with a rating of 4. Updated. Regular: 14. Body Mapping Technology: Our patented V-shaped design delivers support and comfort no matter how you sleep; on your side, stomach or back. 5 in Must Haves Inflatable Foam air Sleep mat Self Inflating air Mattress for Camping cot pad Tent Floors at Amazon. Added temperature Up to 7,0°C *. I can write more on this if you’re interested. Find helpful customer reviews and review ratings for Gear Doctors Ultralight 17oz Camping Sleeping pad ApolloAir - Compact, Warm 5. 2oz). 95 $ 129. 13 oz. It feels similar to standard slick sleeping bag material, but a little velvetier. There was a minor kerfuffle when new ASTM R ratings came out. This ultralight sleeping pad by Gear Doctors boasts a 5. (says 4. A comfortable backcountry pad providing winter insulation and all-season comfort, the Insulated Static V packs light and small and delivers an outstanding R-Value of 4. 00. You can count on the durable, weather-resistant polyester shell to hold up night after night and the. While Therm-a-Rest has always used R-value to rate our sleeping pads, this new standardization will allow campers to make “like-for-like” comparisons with our competitors pad. Weight. It will also make your sleeping system more versatile. This design feature is one of the reasons that Klymit insulated sleeping pads keep you warm in cold winter temperatures but have a different ASTM R rating than before. ASTM F3340-18 is a new testing standard that provides R-value ratings for sleeping pads. EN sleeping bag temperature ratings are predicated on using a sleeping pad with an R-value of 5 or higher. In winter, it is best to use a sleeping pad that has an R-value of higher than 5. Thermarest Prolite Apex – Lightest Self Inflating Sleeping Pad. 97. These systems provide a standard way of rating sleeping bags regardless of their brand. The Synmat UL is a very comfortable rectangular shaped pad, it's great for side sleepers because it's so thick. 4 sleeping pads for 3-4 seasons, cold weather camping (20° F) Use R-value 5. Ultralight Non-Slip Stretch Pillow. 4. 99. While all of our testers enjoyed using the Q-Core SLX, it lacked the wow factor that typically associates itself with award winners, but the strong performance. Exped’s Ultra 7R ($240) is a super cool pad. It scored pretty high in every category except for durability. Moreover, the mattress bears a weight of 440lbs, and Airsoft demonstrated no air leakage or damage during 24-hour static pressure tests. Made. You'll find comfortable sleeping mats for all types of campers, whether you're just starting. There’s no data to show a correlation to how the two ratings compare. Unique, pressure-mapped pattern delivers support and softness. 6 °F (-57 °C). 99. e. Lightweight. If you are taller than that, or like extra leg room, look for a Large version. R-Value: 4. 5,793 global ratings. ProLite™ Plus Women's Sleeping Pad. $159. 1 to 2. Sleeping Capacity. , R-value numbers have no correspondence to temperature). Tags 3-season sleeping bag, choosing the right sleeping bag, how to, sleeping bags, Tips, winter sleeping bagThe award-winning Comfort Plus Insulated Pad absolutely lives up to the hype. ASTM Standard R-Value: Rating Sleeping Pad Insulation; R-Value vs. Pack compact nighttime comfort and support when you have a Coleman® Self-Inflating Pad with Pillow. Rugged, comfortable, versatile and lightweight—hallmarks of a closed-cell design—the NEMO Switchback sleeping pad even has a heat-reflecting film to keep the chill from creeping through. The R-value scale starts with the number 1 and the higher the number, the better it can keep your body insulated from the cold ground. However, R-value is now a standardized measurement of the insulative property of a sleeping pad. 5 x 8 inches, and has an ASTM R-value of 2. 3 R-value which is roughly equivalent to the temperature rating of -4 F (-20 C). For more information on the Section 104(b) of the Consumer Product Safety Improvement Act of 2008 (the Danny Keysar Child Product Safety Notification Act), which requires the Commission to issue consumer. Improved SynergyLink ™ Connectors wrap around your sleeping pad to allow freedom of movement without shifting off the pad and losing warmth. 2, while the men's regular ProLite Plus only has an R-value of 3. It gives great three-season insulation. 0 4. Membership Pricing: $0. Best Ultralight: Therm-a-Rest Uberlite. 5 111 Reviews View the 111 reviews with an average rating of 4. Winter: R3. Inside the ZenBivy Bed, encased in this soft material, is a more comfortable experience than in any of the other bags in this test. Sale price $149. Women’s specific pads tend to be 66 inches in length, which is quite short. Loaded with features and a minimalist pack size, this pad will cover your needs for nearly anything nature can throw at you. That is a way better value for the money. sturdy as the original. Short: 12 oz. 0. Short: 10. The estimated R-value is around 1. Therm-a-Rest's lightweight sleeping pads feature superior construction and unrivaled warmth. ”. Shop for Sleeping Pads at REI - FREE SHIPPING With $50 minimum purchase. We tested sleeping pads from Therm-a-Rest, Nemo, Sea to Summit, and others to find the best option for your next night out. 3 Season – R-value 2. 5 in Must Haves Inflatable Foam air Sleep mat Self Inflating air Mattress for Camping cot pad Tent Floors :. The Kelty Cosmic SI Mummy Sleeping Mat is an unusually generous 198 x 60 x 2. ". ASTM F3340-18 is a new testing standard that provides R-value ratings for sleeping pads. Today. Specifications. Lower limit rating (which is always lower than. com : Coleman Self-Inflating Sleeping Pad with Pillow, 2. The lining material is our favorite: a 50-denier polyester pongee. The Sea to Summit Comfort Plus Insulated is a beast of a sleeping pad. 5 inches The V-chamber design of this sleeping pad creates cushioning at pressure points and prevents heat loss, while the side rails help keep. Cost: $199. With a slightly elevated head baffle and curved, body-mapped baffling, the NEMO Quasar 3D Insulated Air pad keeps you comfy, even on uneven terrain. Not best for cold temperatures. 5in Thick Camping Sleep Pad, No Air Pump Required, Compression Straps Included for Easy Deflation :. While Therm-a-Rest has always used R-value to rate our sleeping pads, this new standardization will allow campers to make “like-for-like” comparisons with our competitors pad. Read honest and unbiased product reviews from our users. Nightgowns, pajamas, robes, or similar or related items, such as loungewear, are included. Sleeping pad R-values are measured using the guidelines written out in ASTM F3340-18, which is a universal standard for testing the insulation in a sleeping pad. ECO 3D Deluxe Flexform® Sleep Pad – Parasailing. Customers can use this figure to compare the warmth of various pads with a clear-cut assessment. 15 sold in last 18 hours. If you are good at taking care of your gear, this is an excellent pad for the price. Features. Insulation: 80g PRIMALOFT Black Hi-Loft Insulation. The definition of a camp utility blanket, the Stellar Blanket is equally at home in the backyard or the backcountry. 30D stretch fabric exterior provides an extra-soft outer layer. While Therm-a-Rest has always used R-value to rate our sleeping pads, this new standardization will allow campers to make “like-for-like” comparisons with our competitors pad. When selecting a sleeping pad, there are several important factors: insulation, packability, R-value, and size. Conduction is heat loss that occurs when you touch something colder than you are, like the ground. Curbside Pickup Available NOW! 100% Satisfaction Guarantee. Qualified orders eligible for FREE S&H and FREE RETURNS. Haven't thought it through at all, but wondering if it would be possible to use that as a pivot point to combine mat ratings and sleeping bag ratings? Use R-value 2 – 3. For the middling price of $150, this sleeping pad has top tier R-Value (4. One glimpse at the Klymaloft sleeping pad ($150), and you’ll know it’s not. 1. com. Regular Wide: 72 x 25 x 3 inches. While Therm-a-Rest has always used R-value to rate our sleeping pads, this new standardization will allow campers to make “like-for-like” comparisons with our competitors pad. 0 to 4. 8 Women’s Warmzone Mat: first impressions. Ultralight sleeping bags & quilts for camping and backpacking. 4cm thick R-Value 2. The camping mattress is held under constant compressive force between a guarded hot plate and a cold plate. ” Given that the new ASTM F3340 effectively tweaked the R values for most sleeping pads on the market, is there any information on how ISO 23537 actually determines if a sleeping pad meets R 4. This is an insulated sleeping pad suitable for all seasons, and with an impressive R-value of 11. Side rails make it easier to stay on the pad through the night. Coleman. The Best Wide. The Oblivion Sleeping Pad uses 3 inch thick tufted I-beam cushioning to keep your shoulders & hips off the ground - even if you're a side sleeper! It was built specifically with comfort in mind, and it does a great job! It's lightweight, comfortable, & warm with an R-value of 3. 3, which makes it best for adventures in warm-weather; it provides minimal insulation from ground temperature " HAHAHAHA I knew this brand was full of %*#( glad I didnt buy any of their stuffs. The Ultimate Hammock Camping Gear Checklist. Gender. If a pad model has multiple sizes, they all have the same R-value unless specified otherwise. 5. It also comes with a patch for a quick hole fix. DURABLE: TPU coating provides higher abrasion resistance. Dimensions. Buy Gear Doctors Ultralight 25oz Camping Sleeping pad ApolloAir - Compact, Warm 5. Therm-A-Rest NeoAir UberLight $539. ASTM F3340-18 is a new testing standard that provides R-value ratings for sleeping pads. As a general guide Therm-a-rest recommend the following: Summer: R1 to R2. By Sam Schild, Brian Martin, and Matt Bento. Many sleeping pad manufacturers send their products to independent testing labs to have their R-values tested, using an industry-standard called ASTM F3340-18 that was rolled out in 2020.