The Quick-Release Dog Backpack will give your dog maximum comfort and convenience when hiking with you. This lightweight backpack is designed with an adjustable harness and removable pack. Large storage pockets hold food, water and other gear. Made with extra-strong, tear resistant nylon for durability and features a Quick Release Leash Holder for use when approaching other hikers, dogs, or wildlife. Also features a reflective safety strip along boths sides of the bag. Available in 4 sizes: Small is recommended for dogs weighing up to 18 lbs with a girth up to 25 inches. The backpack length from head to rump measures 9 1/2 inches. Medium is recommended for dogs weighing 18-50 lbs with a girth of 26-32 inches. The backpack length from head to rump measures 11 inches. Large is recommended for dogs weighing 50-79 lbs with a girth of 30-40 inches. The backpack length from head to rump measures 13 inches. Extra Large is recommended for dogs weighing over 80 lbs with a girth of 36-40 inches. The backpack length fro