Industrial Puppy Removable Dog Backpack with 2 Reflective Velcro Patches, by Easy to attach or detach and offer easy to access storage for essential items like ID, cellphone and keys Made of durable, weatherproof polyester to keep your valuables safe and dry Easily turn your service dog harness into a backpack by adding these easy to use, durable nylon saddlebags EMOTIONAL SUPPORT patches are removable and interchangeable and feature easy to use Hook and Loop backs Compatible with size Medium, Large, XL, and XXL service dog harnesses, comes in sets of 2