The CamelBak Snoblast™ Hydration Pack is versatile and compact. When you really want to load up, the external attachment points let you carry a helmet and snowshoes on the outside of the pack. The Therminator™ harness also keeps your insulated drinking tube zipped securely into the shoulder strap, which keeps it from freezing in cold weather. The tri-zip design lets you choose between opening the top of the pack or unzipping it down the side to instantly access all of your gear. Carry your lunch, shed layers, helmet and 2 liters of hydration in the CamelBak Snoblast™ Hydration Pack.