product description Color: red, gray, black S: 23 x 12 x 42 cm, M: 25 x 12 x 48 cm L: 28 x 12 x 57 cm Material: High Quality Oxford Cloth Contents: 1 x Dog Backpack. 1. COMFORTABLE MATERIAL - This bag is made of machine washable, breathable, soft fabric. The material is thick enough to ensure softness to keep your pet comfortable, and the large ventilation windows on both sides of the pack make it comfortable and breathable. 2. SAFE - This pet carry bag keeps your pets light and comes with safety buckles to keep your pets safe. The backpack has reflective strips on the front and shoulder straps for safety at night. 3. Outdoor lifesaving whistle - If you encounter an unexpected situation, you can whistle for help. The shoulder strap slider can be adjusted up and down, suitable for all kinds of people. 4. SUPER COMFORTABLE FIT AND COMFORT - The straps and shoulder straps have extra thick padding for comfort on long journeys. Zippered pockets to help you store coins or equipment, keys, cards and more. 5. I'll follow you wherever you go - whether you're going, walking, hiking, weekend adventures, traveling, shopping, biking, underground, etc. Suitable for medium dogs, corgis, teddy, french bulldogs, Shiba Inu, not suitable for large dogs.