Where to Buy
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Here's what other sites are saying:
Rather than buying multiple backpacks, snag the Arva X-Powder 15L Zip-On Backpack and transform your ABS Powder airbag base unit or classic Arva base unit into a perfectly sized winter or summer daypack. The X-Powder zips easily on to both bases, letting you customize it depending on season and mission, and sports key features like a a retractable ski and snowboard carry system, a hydration sleeve, and an ice axe loop for your winter adventures. At 15L, it's big enough to carry what you need without being overwhelmingly large, and the 450D polyester is rugged enough to withstand grabby trees, sharp rocks, and even a few quick nibble from a rogue marmot.