Product Description Color: Red, Grey, Black S: 23 x 12 x 42cm, M: 25 x 12 x 48cm 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 soft, breathable and machine washable fabric. The material is thick enough to provide softness to keep your pet comfortable, and the large ventilation windows on both sides of the bag make it comfortable and breathable. 2. SAFE - This pet carrier bag keeps your pets lightweight and comes with safety buckles to keep your pets safe. The backpack has reflective strips on the front and shoulder straps for added safety at night. 3. Outdoor rescue 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 - Shoulder straps and shoulder straps have extra thick padding for extra comfort on long rides. Zippered pockets to help you store coins or gear, keys, cards and more. 5. I'll follow you wherever you go - whether you go, walk, hike, weekend adventures, travel, shopping, biking, subway, etc. Suitable for medium dogs, corgis, stuffed animals, French bulldogs, Shiba Inu, not suitable for large dogs.