Asolo Gear Silva 32 Degree Ultra Light Mummy Sleeping Bag (Blue/Black/Red Trim) 100% Polyester/ Lining 100% Polyester / Shell 100% Polyester Imported Perfect mummy bag for summer use and hosteling Shell 40D-240T ripstop Lining 40D-240T ripstop with 40D-340T fabric around facial area Quadratherm Plus hollow fiber 1.08 lbs. 320F Compression stuff sack