Equipped for a multitude of adventures and day hikes, the CamelBak Arete 22 Hydration Backpack keeps you pleasantly hydrated as you trek across ancient ruins halfway across the globe or misty forests in your backyard. Its 2 liter 70 ounce hydration reservoir keeps you hydrated for hours at a time. Plus, you'll find a built in security pocket for storing snacks and daily items, such as cash and keys. Serving double duty, this hydration pack transforms into a dedicated reservoir sleeve that conveniently sits inside larger backpacks Suddenly, regular packs are equipped to hold 2 liters of water without worrying about it leaking or jostling around. Other key features include Air Mesh shoulder straps that reduce perspiration build up, as well as a removable framesheet for bolstering heavy loads.