Winter Sleeping Bag, -20°C for Extreme Cold, Quick-Exit | Polus 400The Polus 400 winter sleeping bag delivers exceptional warmth for extreme cold weather adventures. Engineered with dual layer HollowCore insulation (2200 g m), it ensures comfort down to 13C (8. 6F) with a lower limit of 20C ( 4F). The 210T Polyester Ripstop shell provides durability while the T C Fleece lining offers superior comfort. The innovative dual two way zipper system enables quick exit when needed. A draft collar and insulated zipper baffle