With a full 1.2-inches of foam, Flex 3R is our thickest, most-comfortable closed-cell foam mat. It is highly versatile for standalone use and will increase warmth and puncture protection for inflatable sleeping pads. When layered underneath your inflatable mat, Flex 3R’s R-value of 2.8 can boost a 3-season sleeping mat to all-season efficiency. The folding form is quick to deploy and folds up tidy for attachment to a backpack or bike. Features Extra thick 1.2" of foam (vs. < 1" in classic foldable foam pads) for added insulation from the ground in cold conditions. Rapidly deployable Incredibly quick & easy to unfold and set up. Eco-friendly Made from high quality, eco-friendly IXPE foam. Highly versatile For standalone use or puncture protection & increased thermal performance when layered underneath an inflatable sleeping pad. Specifications R-Value 2.8 Insulation Performance 3-Season Dimensions M: 72 x 20.5 x 1.2 in LW: 77.6 x 25.6 x 1.2 in Weight M: 1 lb 2 oz LW: 1 lb 5.5 oz Packed M: 20.5 x 7.9 x 5.9 in LW: 25.6 x 8.7 x 5.9 in Materials Closed-cell IXPE foam, DWR free Sustainability Climate Contribution EXPED calculates all climate emissions from the production and transportation of this product and finances certified climate protection projects through myclimate to an equal extent. PFAS Free This product is free of per- and polyfluoroalkyl substances, a family of non-degradable, man-made chemicals commonly used as dirt and water repellants