At the park, on an off-piste adventure, or simply getting from the car to the lift, Camelbak(R) SnoBlast(TM) keeps gear and water close at hand. Expandable pack carries as much or as little as you need--skis or a board, extra layers and your tunes. Easy-to-use retention system holds skis diagonally or a board vertically. Easy-fill, easy-clean design thanks to the OMEGA(TM) reservoir; full-zip back panel access makes loading a full reservoir into the pack easy. Reservoir holds up to 70 fluid ounces (2 liters), giving you access to clean, refreshing water on command. Fully insulated drinking system resists freeze-up. Big Bite(TM) valve is ergonomically positioned for easy drinking. HydroGuard(TM) technology embeds an FDA-approved silver ion compound into reservoir film and delivery tubes to eliminate bacterial growth. Padded front pocket holds CD player or MP3 player and tools. Delivery tube and bit valve are fully enclosed in shoulder strap to protect from freeze up; tuck a hand-warmer