1. Adjustable Pet Backpack: Features 4 leg holes and two adjustable front straps to keep your pup safe and comfortable. The shoulder straps can be adjusted into an Xshaped design for enhanced security and antislip performance. The side buckle closure and zipper allow for quick and secure wearing. 2. Soft Material: Made of breathable mesh fabric, polyester, and a waterproof lining, this pet backpack is durable, skinfriendly, lightweight, and comfortable, ensuring your dog feels and enjoys hiking or traveling with you. 3. Multiple Size Options: Designed for small dogs/cats, it is recommended for pets under 8 kg (17.6 lbs). Please measure your pet and refer to the size chart. If your pet falls within the overlapping weight range of two sizes, we suggest choosing the larger one. 4. Super Comfortable: Both the shoulder straps and adjustable straps are padded to reduce weight on the shoulders and back for a more comfortable fit. Large mesh ventilation areas keep pets cool and comfortable. A builtin safety lock prevents pets from jumping out.