Take your Hydro Flask with you, but keep both hands free to paddle, climb, or high-five at the top of the hike. This sling was designed to make hydration on the go easier than ever.. Fabric: Polymax 420D nylon upper and 5mm EVA foam with 400D nylon liner. Welded webbing and attachment mounts for extra durability. Standard size fits 12, 18, 21, and 24 oz. standard mouth bottles. Fully adjustable, stretch-woven Sliplok strap can be worn across the body or over the shoulder, making it easy to carry whether you're out for a hike or a sunset stroll.. Stretch-woven and bonded, the Essentials pocket features a watertight zipper for safely storing keys and other accessories.. Five-year warranty. Diameter: 3.75". Height: 8.5". Weight: 5.25 oz.. Spot clean. Imported.