The Osprey Backpack Accessories Expansion Pack is a rare, possibly discontinued item that increases the capacity of compatible Osprey backpacks. Made from durable nylon with a zip closure, this army green accessory pack features two pockets for added storage. Easy to attach to backpacks, this 14.5" pack weighs 11 oz and is ideal for backpacking activities. Perfect for outdoor enthusiasts looking to expand their backpack's storage capabilities, this Osprey accessory pack is a must-have for any hiking trip.