Slackcountry, Sidecountry, Backcountry. The BCA Stash packs feature a backpack for any winter objective that you can dream of. Built around durability and function, all of our Stash backpacks feature optimal helmet and ski/snowboard carrying options. All models are compatible with our BC Link™ radios. Hydration system can be placed in the Stash hydration sleeve to prevent freezing.