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 Fabric 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 and make your pet comfortable, with large ventilation windows on both sides of the backpack. It is comfortable and breathable. 2. Secure – This dog backpack keeps your pet light and has a safety strap to ensure your pet's safety. The front of the backpack and the shoulder straps are equipped with reflective strips to ensure safety at night. 3. Emergency Whistle Pipe for Outdoor Use – If you encounter an unexpected situation, you can whistle for help. The adjustable shoulder strap can be adjusted up and down, suitable for all types of people. 4. Superior Comfort Fit and Comfort – The back and shoulder straps are equipped with extra thick padding for comfort during long trips. A zipper pocket can help you store coins or units, keys, cards, etc. 5. No Matter Where You Go, I Will Follow You – Whether you are walking, hiking, weekend adventures, traveling, shopping, cycling, subway, etc. Suitable for medium-sized dogs, Keji, Teddy, French Bulldog, Shiba Inu; not suitable for large dogs.