Staying hydrated is easier with the Hydro Flask Medium Tag Along Bottle Sling. You never have to leave your water bottle behind again. This sling holds 32oz and 40oz bottles, which is plenty to give you hydration for much of the day. An adjustable strap provides a universal fit for any height. The material offers durability and protection for your water bottle as well as other necessities with a zippered waterproof pocket. Even with its durability and longevity, it weighs only 6.25oz for easy carrying all day long.