Yoption Portable Pet Travel Backpack, Newstyle Breathable Dog Cat Pet Carrier Travel Carrier Bag Front for Small dogs Carrier Bike Hiking Outdoor Please Note the Size before you buy: L: Up width:20cm/7.8", Down width:36cm/14.2", Height:40cm/15.7", Bottom width:19cm/7.5", suitable for under 5kg/11 lb pets. Contraction rope design: it could be 18cm/7" in minimum and 54cm/21.2" in maximum according to pet's head size. Mesh Ddsign for Ventilation & Visible, Mesh Pockets for storage - Mesh windows are ventilated and visible, making your pet breathe freely and relax. Zipped top entry allows for easy access. Mesh side pockets help store leash, whistle, water, snacks, treats and other necessities. Padding Panels & Removable Bottom Cover - With EPE foam padded back and sides, Yoption's pup pack help your pet enjoy a nice nap. Removable bottom cover makes it easier to clean. Adjustable Straps & Interior Drawstring - Adjustable padded straps 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. Airline Approved & Ideal for Outdoor Trips - Airline compliant dimensions for pets. Great for sightseeing, camping or trips to the vet. Is your lovely pet tall and light, or small but heavy? Remember to measure its dimension firstly; a carrier should be a comfortable house for your adorable pet.