(Previous design) - Designed to fit our Urban Trail Harness and most harnesses with a neck and girth strap. The Urban Trail Pack attaches to the neck and girth with velcro straps. It's lightweight ergonomic design is perfect for partial day hikes and allows your dog to "work" by carrying their own food, water, poop bags, AO's Collapse-a-Bowl, etc. Expertly crafted with tough Cordura; features reflective bands, and key snap in pouch. Sizes listed fit corresponding sizes of our Urban Trail Adjustable Harnesses.