Perfect for backpacking and trekking in cold but dry conditions. Whether staying in unheated tea-houses in the Himalaya or winter rooms in the Alps this warm but lightweight bag is ideal. Specifications HELIUM(TM) 20 outer shell is very light and highly breathable 766g of 90-10 Pure Duck Down with a minimum fill power of 700 Alpine fit maximises thermal efficiency Slanted Box-Wall baffles throughout Mid-level side seams 5 baffle anatomically shaped hood 4 baffle anatomically shaped and offset foot-box Full length Gemini(TM) zip baffle and integrated collar with Lode Lock(TM) closure Supplied with waterproof roll-top stuff-sack and storage cube Weight : 1260g / 44oz 100% Polyamide outer/inner, Down fill HELIUM(TM) 20 outer shell is very light and highly breathable Alpine fit maximises thermal efficiency