Light, durable and versatile closed-cell foam mat in a rapidly-deployable folding form. FlexMat can be used alone for alpinism and ultralight backpacking, or under an inflatable mat as puncture protection and added insulation.. . . . . Closed-cell foam. DWR-free. Season: Summer. R-Value: 1.5. Person Capacity: 1 . Temperature: 41 degF. Packed Dimensions: XS: 20.5 x 5.1 x 4.3 in / M: 20.5 x 5.1 x 5.9 in / LW: 25.6 x 5.5 x 5.3 in. Weight: XS: 7.9 oz / M: 11.5 oz / LW: 16.8 oz. Foot width: XS: 20.5 in / M: 20.5 in / LW: 25.6 in. Length: XS: 47.2 in / M: 72 in / LW: 77.6 in. Width: XS: 20.5 in / M: 20.5 in / LW: 25.6 in.