The Bantamweight is insulated with exceptionally high quality down: its fill power rating is a whopping 900+. This, together with superlight fabrics and a short zipper help bring the bag's weight to a level you usually see with summer bags. As is common nowadays, the insulation is impregnated with Down Defender, to reduce the bag's reaction to damp conditions. It also reduces the down's tendency to clump together. - Short size: for max. 168 hikers, shoulder girth 145 cm, hip girth 133 cm, foot box girth 112 cm - Narrow Slim mummy shape - 460 grams of fp900+ quality RDS certified goose down - Surface and liner fabric are 7 denier mini ripstop Nylon - Shaped baffles help keep the down in place.