Thermarest ProLite 4 Mattress Pad

The lightest, most compact 4 season mattress.Features Innovative new materials reduce weight by 25% Tapered ergonomic design rolls up super small Super grip bottom keeps mattress from slipping Ideal Uses Great for mountaineering, winter camping, backpacking, and multi day adventuresSpecs Weight 2 lbs 1 oz large, 1 lb 8 oz regular, 1 lb small Rolled Size 13 x 5.1 large, 11 x 4.8 regular, 11 x 4 small R Value 3.2 Thickness 1.5 3.8cm