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 feel comfortable, large ventilation windows on both sides of the backpack, comfortable and breathable.2.【SAFE】 - This pet carrier bag will keep your pet light and has a safety buckle to ensure your pet is safe. The front of the backpack and shoulder strap are fitted with reflective strips to ensure safety at night.3.【Outdoor Life Saving Whistle】 - If you encounter an unexpected situation, you can whistle for help. Shoulder strap slider can be adjusted up and down, suitable for all kinds of people.4.【SUPERIOR COMFORT FIT AND COMFORT】 - The back and shoulder straps are equipped with extra thick padding for comfort on long journeys. Zipper pocket, can help you store coins or devices, keys, cards etc.5.【No matter where you go, I will follow you】 - Whether you're going, walking, hiking, weekend adventures, traveling, shopping, cycling, underground etc. Suitable for medium dogs, Keji, Teddy, French Bulldog, Shiba Inu, not for large dogs.