Low in weight and warm enough for early Spring and late Autumn use, this all-round performance bag is perfect for backpackers and trekkers.The 620g of 700FP Pure Duck Down is encased and protected in a compressible, tough and extremely comfortable Helium 20 fabric. The Helium 20 is a densely woven construction that ensures the highest levels of down-proofing, wind resistance and resistance to heat loss. As well as reduced seam slippage, the Helium 20 offers greater hand-feel and durability.Material & Insulation100% recycled and PFC-free HELIUM™ 20 outer shell100% recycled Supersoft 20D lining with PFC free DWR620g of 90-10 Pure Duck Down with a minimum fill power of 700FeaturesAlpine Fit 2.0 improves comfort and maximises thermal efficiencySlanted Box-Wall baffles throughoutMid-level side seams5 baffle anatomically shaped hood4 baffle anatomically shaped and offset foot-boxFull length Gemini zip baffle with 140cm zip and integrated neck collar with Lode Lock closureSupplied with waterproof roll-top stuff-sack and storage cubeLeft-hand ZipLong LengthTemperature RatingsGood night’s sleep temperature: -10°CComfort: -5°CComfort Limit: -11°CExtreme: -31°CA closer lookSlanted box-wall baffles throughout the entire main body removes weight without compromising on warmth. Full length Gemini zip baffle prevents snagging and allows for efficient opening and closing, while the new Lode Lock closure system allows for one hand opening. Supplied with waterproof roll-top stuff-sack and storage cube. Mountain Equipment Helium 600 Sleeping Bag - Long