【Classic Folding Foam Pad】: With an ASTM F3340-22 Rated R-value of 1.8, the Dual-density IXPE foam material offers warmth and moisture resistance. They are also designed for better weight support and durability and offer a comfortable night’s sleep with no risk of punctures or leaks. 【Economical Comfort】: The more eco-friendly IXPE foams are softer for extra comfort, making it an ideal choice for both solo 3-season camping and use in combination with an inflatable pad in colder environments, perfect for hiking, mountaineering, and other outdoor activities. 【Portable Design】: CAUTION PLEASE NOTE Thickness (from upper top convex part to lower concave bottom portion): 1.8cm±0.1cm | Unfolded size: 188*55*1.8cm | Packed size: 55*14*13.5cm | Weight: 430g±10%. 【Extra Durable】: Virtually indestructible, the proprietary closed-cell foam provides lasting, economical comfort. The classic foam sleeping pad is durable, wear-resistant, puncture-resistant, and highly supportive, making it an essential piece of gear for many outdoor enthusiasts. 【Endless Utility】: Multi-purpose, sleeping mat, seat cushion, pillow, cloak… or add 1.8 R-Value and protection from punctures when you layer it under another sleeping pad. Fold it and find your best uses. 【Lifetime Warranty】: Supported by a Canadian company with a lifetime guarantee. We stand behind the quality of our products and will repair, replace, or refund any item with confirmed defects. CAUTION PLEASE NOTE Thickness (from upper top convex part to lower concave bottom portion): 1.8cm±0.1cm | Unfolded size: 188*55*1.8cm | Packed size: 55*14*13.5cm | Weight: 530g±10%. The S55 is the classic closed-cell folding egg nest foam sleeping pad with an R-value of 1.8 (tested to ASTM F3340-22) and can be used in 3 seasons: summer, late spring, and early autumn. The S55 is the most comprehensive utility usage foam mat used on any condition, or under an inflatable mat as puncture protection and added insulation.