The Hydro Sleeve is the perfect solution for carrying water bladders inside your Stone Glacier pack. Large enough for any 3-liter bladder system, the Hydro Sleeve mounts on the sewn in 3/4" black trislide on the inside back-panel of all Stone Glacier bags. Hoses can be run through the right or left side of the Hydration Port at the top of all packs. Hydro Sleeves also work great for packing food, clothing, or other loose gear. Made in the USA. 16" tall x 8" wide x 3" deep, weighs 1.7 ounces.