[Great Quality & Ergonomic Design] The fabric applied to this backpack is canvas and polyester that are eco-friendly, durable, lightweight, waterproof, and easy to clean. The ergonomic adjustable cushioned cotton straps can effectively relieve pressure to avoid unpleasant feelings for carrying your pet [Spacious] With the size of 15x11x15in and a load capacity of 25Lbs, the carrier provides sufficient space for your cat/puppy to rest and be cozy. The structure of the backpack is stable and does not bend inward. There are also additional storage pockets on the side for potty pads, poo bags, leash, phone, wallet, treats, etc. [Breathable & Transparent] With the mesh & transparent design, it can remain a smooth air circulation for your pet, and you can also keep monitoring your pet effortlessly. There is an additional detachable sitting mat that can offer extra comfort when the weather is cold.