Recommended for small and medium dogs under 35 lbs: This front dog carrier is designed to carry dogs.When choosing the pet carrier, please measure your pet and choose the right size according to our size chart.Better Breathability: The more open area and all air mesh lining on this dog bag carrier ensures breathability, preventing you and your pet from being stuffy and allowing your pet to move more freely without being restricted.Easy to carry and use: This dog carrier backpack has a fully adjustable buckle.It prevents our pets from getting caught in the old fashioned zippered front dog carrier and doesn't slip as easily as zippers.This design allows us to quickly put on the pet pack and adjust to a more suitable size for pets to keep them safe and comfortable.Comfort and Safety: The front chest support for dogs uses thickened pearl cotton pads and buttons to move the force point down from the pet's neck to the chest and abdomen, improving the comfort and safety of the pet.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: dog hiking backpack, adjustable and breathable, can be worn on the front or back.Give you and your furry friend better ways to travel, including hiking, traveling, walking, shopping, biking, camping or other more fun outdoor activities, without hurting your pet's knees or waist.