Osprey Viper 4 Pack
Osprey Viper 4 Pack (Courtesy of Osprey)

Osprey Viper 4 Pack

Osprey Viper 4 Pack
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Receive $50 off an eligible $100 purchase at the Outside Shop, where you’ll find a selection of brand-name products curated by our gear editors, when you sign up for Outside+ today.

Osprey’s Viper 4 pack has a trick rigid bladder and handy magnetic retention system for the bite valve.

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