DESC: The Backside 0° Back It Polarguard 3-D Mummy Bag 20001Overlapping shingle construction gives you ultimate heat retention and prevent cold spots with forming with our xtreme shingle constructionOversized draft tubes add total protection against cold air coming in or heat leaking outYKKself locking zipperBoth shell and liner are made with super-light down proof mini-diamond ripstop made from tactelZipper design at ground level to help retain heat4 strap compression bagWider chest and shoulder designed bag to let you sleep in styleErgonomic hood designed to wrap around your head for comfort and prevent heat lossBag dimensions: Length 88'', Shoulder 35'', Foot 23''Bag Weight 3.7 lbs.Fill weight 2.6 lbs.Pack size 16'' x 9''Outer shell: Dupont tactel mini diamond ripstop- Sunset RedLining: Dupont Tactel mimi diamond ripstop- BlackFilling: Polarguard 3D