Yerwal Pet Dog Cat Carrier Portable Outdoor Travel Backpack-Upgraded Version Double-shoulder carrier.Fit pets like dog ,kitty below 15.5 lb maximum for everyday walk and weekend adventure. The pet carrier backpack is made of high quality soft sandwich mesh fabric which is environmental quality and no pungent taste. With these kind of cotton mesh,so it is comfortable ventilation. Adjustable Shrink rope design according to the baby's head size, it can be narrowed to 7.09 inch and extended to 21.26 inch. So you don't need to worry about your pet will not feel that it cannot put its head out. To prevent the dog to escape from the backpack, it has design packs of rope buckle.Therefore, you can have a safe travel. Package Include:1*Pet Outdoor Travel Backpack.