About this item【Suitable】 - Size Medium: 39 * 31 * 25cm / 15.3 * 12.2 * 9.8in, suitable for small dogs / cats up to 5.5kg / 11lb; Size Large: 40 * 37 * 28cm / 15.7 * 14.5 * 11.0in, suitable for medium-sized pets weighing up to 7.5kg / 16.5lbs. walking, travelling, hiking, cycling or any other daily use.all safe inside.【Breathable Material】–Made of cationic linen + breathable mesh, eco-friendly polyester fabric interior, roller shutter window, breathable and visibility to ensure your pet’s comfort, make your pet relaxed and relaxed【High Grade Zipper】- high quality SBS lock zipper and soft chest strap buckle, comfortable and durable.Internal reinforced structure, the backpack carries -dog on a leash, which is useful for keeping your pet safe inside.【Convenience】- Side pockets and security pockets with shoulder strap and shoulder strap can store a leash, water bottle, snacks, toys, garbage bags s for pets, bags for keys and other supplies.【Portable and Foldable】- dog backpack easy to