With a full 1.5-inches of foam, FlexMat Plus 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, FlexMat Plus&';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 1.5" 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. R-Value 2.8 Temperature 23 AdegF Dimensions M: 72 x 20.5 x 1.5 inLW: 77.6 x 25.6 x 1.5 in Weight M: 18.2 ozLW: 21.5 oz Packed M: 20.5 x 5.9 x 7.9 inLW: 25.6 x 5.5 x 4.7 in Closed-cell IXPE foam, DWR free