Designed to fit on most backpack shoulder straps for easy access to things you need to keep handy. Two omnitape straps to attach to strap. Mesh front pocket with velcro closure. Waterproof zipper. Constructed of 1.1 oz. silicone impregnated ripstop nylon, and 200 denier packcloth. Made in the USA. Small dimensions: 3" W x 5.5" H x 1.25" D. Weight: 1 oz.|Large dimensions: 6" W x 4.5 "H x 1.5" D. Weight: 1.2 oz.