
Compared to old style Same: 1. Size Medium: 39 * 31 * 25cm / 15.3 * 12.2 * 9.8in, suitable for small dogs / cats up to 11 lbs; Size Large: 40 * 37 * 28 cm / 15.7 * 14.5 * 11.0in, suitable for medium-sized pets up to 16.5 lbs. 2.Material: made of cationic linen + breathable mesh, interior made of environmentally friendly polyester fabric, roller shutter window, breathable and visibility to ensure your pet's comfort, make your pet relaxed and restful. 3.Convenient Pocket: Security pockets for back and shoulder straps, plus pockets on both sides, can store a leash, water bottle, snacks, toys, pet garbage bags, key bags and other supplies. 4.Foldable: Easy to store dog backpack, not easily deformed. Difference 1.The backpack upgraded with the chest strap buckle. 2.The older backpack with safety buckle zipper, upgraded with high quality SBS zipper. 3.Upgrade the backpack with the double-sided soft interior mat for all seasons.