THE NORTH FACE Flask Heated Hydration Pack
Powered by four AA batteries, The North Face Flask Hydration Pack features an integrated HTR heating system to keep your water flowing, even on the coldest of days (up to 20 hours at 15°F)! Streamlined with 250 cu. in. of cargo space, you still have 70 fl. oz. of fluid capacity to keep you hydrated. Great for the fast-moving winter athlete who wants high performance in a simply designed hydration pack.