Therm-a-Rest EvoLite Lightweight Self-Inflating Foam Backpacking Mattress Ultralight AirFrame Construction: Alternating foam and air channels allow us to drastically reduce weight and packed size while amplifying loft Supportive Foam: Our U.S. sourced foam is the lightest and most compressible foam on the market 2 of Loft and Comfort: No other ultralight self-inflating mattress provides this amount of comfort. Self-Inflating Convenience: Excellent self-inflation allows just a few breaths to top off the mattress for optimal firmness. Stuff sack included