The Therm-a-Rest Neo Air Season all sleeping pad is easy, durable and extremely warm - the ultimate solution for backcountry comfort in every season. The isolation barriers contained (Therma Capture Radiant Heat Technology) and the Triangular Cor matrix with its numerous cells for maximum and minimum Twilight convective heat at an ultralight weight. Sturdy construction and a thickness of 6.35 cm (2.5 inch) provide very high comfort and good sleep. - High insulation performance: Also suitable for winter use - Very small pack size and very easy! Only 540 grams in size "R" - easily inflatable with the included pump bag. - Size M: 168 x 51 x 6.3 cm, only 510 grams | Size R: 183 x 51 x 6.3 cm, only 540 grams | Size L: 196 x 63 x 6.3 cm, only 710 grams

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