The ultralight Koa 22 Dry Backpack weighs in at only 5.2 oz. or as much as a baseball, and packs down smaller than a baseball too. This pack has amazing dry bag technology featuring 30D ripstop cordura nylon with PU and silicone coating fabric, which does a great job keeping water from waterfalls, glacier snow, and slips into the stream on the outside of the pack and it’s contents nice and dry. Even the closure for the main pocket rolls over itself for water resistance. The Koa 22 is the perfect pack to store in your car or take along with you in your larger pack for those unexpected adventures that you just can’t pass up.