High Sierra Symmetry 18 Backpack Roomy panel-load main compartment holds and organizes shovel, probe and other avalanche rescue tools Zippered mesh organizer and key-fob inside main compartment keeps your essentials within easy reach and out of the snow Separate compartment on the back of the bag securely holds hydration reservoir and keeps it away from sharp objects (reservoir not included) Zippered hydration tube cover on the shoulder strap is insulated to help keep bite valve from freezing. Integrated sport flap on the front of the bag has fold-away tab can be used to carry a helmet, or snow-shoes and other gear