The lightweight and breathable stratus polyester insulation is quick-drying and has excellent temperature regulation.The sleeping bag also features a blanket base construction to enhance thermal efficiency, as well as an internal draft collar to keep out the cold and an angled foot box to keep your feet warm. Lightweight 20d polyester liningLightweight 20d ripstop polyester outerStratus polyester insulation ¾ length YKK5 coil main zip with full length baffle and noctilucent pullersBlanket base construction Shingled upper construction Proportionally designed differential cut Anti-snag bonded zip guardAngled foot boxInternal stash pocketInternal 3D collar and hood draw cordCompression stuff sackTemperature tested to new European standard EN13537:2016Comfort temperature: 4°CLimit temperature: -1°CExtreme temperature: -16°CWeight: 950g