This is a high-quality Dog Saddle Bag, the specific can refer to the 5 bullet points.

Easy to Use: It has a convenient towing rope buckle. The strap can be adjusted according to your dog's bust. Quickly help your dog to carry/remove the backpack when traveling. Reinforced grab handle: Reinforced grab handle to help maneuver your pet, especially if they get stuck in an area during hiking or camping. Please note the grab handle is not meant for carrying your pet. Reflective stripping and a D-ring for easily attaching a leash. Side Pockets: The side pocket is lagre enough for you to put the stuffs you have to bring while travel. Material: Dog saddle bag is made of lightweight oxford fabric with water resistant coating. Mesh fabric harness to allow increased comfort and breathability. Adjustable straps to fit your dog properly and decrease the possibility of your dog developing hot spots. 2 Sizes: M: 24-31 inches; L: 27-35 inches. Choose the right size based on your dog's girth. Girth can be determined by measuring around the widest part of the rib cage.