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The North Face Snowday Hydration Backpack

The North Face Snowday Hydration Packs electric-heated hydration system keeps the water flowing when you head out for a sub-zero dawn-patrol ski tour. Its HTR heating system is powered by four AA batteries, and keeps your drinking tube and 100oz bladder from freezing when the temps are so low that your breathe freezes in front of you. The Snowdays stowable hip-belt and compression straps make it comfortable to carry your day-touring gear in its 730cu inches of storage space.