The Brooks Range Drift 30 Sleeping Bag is designed with one thing in mind, to keep you warm and comfortable when you're sleeping. This bag features 850 DownTek goose down that's treated to withstand moisture and retain loft. The nylon outer shell is given a DWR treatment, so the dew on your bag won't leave you crawling into a sopping mess the next night out. A baffled draft tube helps keep cold air from getting in the cracks, and the ergonomic footbox makes sleeping naturally that much easier. An internal storage pocket lets you tuck your music player away when it's time to conk out.