High Quality Mesh Fabric: Environmentally friendly & no pungent smell, breathable and making your pet breathe freely and relax. Mesh side pockets help store leash, whistle, water, snacks, treats and other necessities. Top zipper opening for easy access. Carrying your pet safe, comfortable and easy when you're hiking, travelling or outgoing. Great choice for walking, cycling, traveling and other outdoor activities with your pet. It's great for sightseeing, camping or trips to the vet, recommend for Cat, small dog, Mini poodle, Mini Schnauzer, Mini Teddy, Chihuahua, Yorkshire, Pomeranian, Chihuahua, Poodle, Shih Tzu and other similar size pets Adjustable Straps and Interior Drawstring: Adjustable padded straps will be more convenient to carry and help to reduce the burden. Extendable strap with buckle keeps the backpack stable. Interior rope with buckle prevents your pet from jumping out or hurt itself. Please Note the Size : S: 38 x 30 x 14 cm, M:40 x 35 x 17cm((15.7 x 13.7 x 6.6 inch). Suitable for pet within 3.0kg/6.6 pounds. M: Adjustable Shrink rope design according to the pet's head size, your pet will not feel that it cannot put its head out