Osprey Viper 13 Hydration Pack from Zombie Survival Kit

Zombie Survival Kit

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Osprey Viper 13 Hydration Pack

Get out! But as you bolt for safety into the less populated hinterland—after all, fewer people means fewer zombies—you’re going to want to carry your survival gear in a pack that has enough space for the bare essentials, but is light and comfortable enough not to impede you while running to safety. The Viper 13 has (you guessed it) 13 liters of storage and a separate pouch for a 3-liter hydration bladder.
$109 on eBags.com