The Camelbak Zoid Ski Hydration Backpack is designed with a single purpose: to minimize your bulk during your ski outings. You can easily wear it under your jacket or over it. Additionally, the small volume allows you to simply carry the essentials for your mountain trips: snacks, phone, keys... Moreover, this Camelbak Ski Backpack features a pocket designed to hold a 2 L Crux reservoir, keeping you hydrated all day long. Lastly, you'll appreciate the technical details like the Therminator harness with thermal protection for the hydration tube and a Snowshed™ back panel to prevent snow accumulation under your jacket.