Perfect for cold weather excursions or to just have on hand in case you get stuck in one of those wicked winter power outages. This High Peak Summit 0-degree XL Sleeping Bag is rated to withstand temperatures dropping to 0 degrees Fahrenheit while providing ample room for those of us who need the extra space over what a typical sized bag offers. The sewn-in draft tube and chest collar features are there to keep the chill out as are the hood (drawstring closure) and barrel lock. The shell is made of 100% ripstop polyester taffeta and the liner is polyester taffeta for comfort.