SKU: SS22111V Down Treatment: Hydrophobic Fill Power: 800 Insulation Type: Down Weighs: 1548g (Regular) Comfort Limit: -30°C Zip Length: Short Zip Zip Position: Centre Zip Fill Weight: 965g (based on regular size) Type: Mummy Extreme bag for, extreme conditions. This poler bag was designed to keep you warm whilst exploring the coldest places on earth. Thermarest says Designed in conjunction with renowned polar explorer Eric Larsen, the Polar … Polar Ranger -20F Down Sleeping Bag