Recommended to Small Medium Dogs Under 35 lbs: This front pet dog backpack carrier is designed for carrying dogs. While picking the pet carrier backpack, please measure your pet and choose the right size according to our size chart. Better Breathability: The more open area and all the air mesh padding on this dog bag carrier ensures breathability, keeping you and your pet from being stuffy and allowing your pet to move more freely without being restrained. Ease to Wear and Use: This dog back carrier backpack features an adjustable full buckle. Prevents our pets from getting caught in old-fashioned zip-up dog front carrier and and doesn't slip off as easily as zippers. This design allows us to quickly put on the pack for pets and adjust to a more suitable size for pets to keep them safe and comfortable. Comfort and Safety: The front chest carrier for dogs uses thickened pearl cotton pads and buttons to move the point of force down from the pet's throat to the chest and abdomen, improving the pet's comfort and safety. And we widened the shoulder straps and added adjustable safety buckles on the back and waist to balance the weight and reduce the burden on the owner. Lightweight and portable: PetBonus adjustable and breathable hands-free dog hiking backpack can be worn on your front side or back side. Provides you and your furry friend with better ways to travel including hiking, traveling, walking, shopping, biking, camping or other more fun outdoor activities.