Outer made from Pertex 6 Shell with 'AquaTherm Extreme' pile lining, with a Pertex detachable "Thermaliner". Designed for high altitude use on winter bivouacs. As weight and bulk are paramount for such usage, Buffalo clothing is intended to be used instead of an Inner Bag. It is advisable to use a bivi-bag as well. The "Thermaliner" increases insulation, but also protects the pile from being clogged up with dirt when bivvying. Attached inside the Outer by tape loops and toggles it is very easily washed and dries very quickly. Features include: • A full length two way heavy duty front zip protected by a zipped weather baffle. • Baffled shoulder zips. • Three internal elasticated adjusters assist insulation by reducing dead air space within the bag. • The hood is fitted with a two way zipped snorkel to fully enclose the face when needed. Sizes: S, M, L, XL. View Size Guide Colours: Cobalt, Nato Green. Weight: 1857g Packed Size: 30 x 25cm