Fill up the included 100oz hydration bladder, tuck it into the Backcountry Access Stash BC Pack, and head out for a full day backcountry tour. Thanks to this backcountry skiing backpacks winterized hydration system, your water will remain in its liquid state for the entire trip. The Stash BCs hose and bite valve are neatly stashed inside a Outlast insulated shoulder strap, which stores body heat, then releases it when the temperature drops, keeping the bite valve and tube free of ice. Backcountry Access also gave the Stash BC an external shovel and probe pockets to keep your avalanche rescue close at hand. The removable plastic and foam framesheet adds support for longer tours.