Why choose Yizhi Miaow cat harness? Because cats are built differently than dogs, Yizhi Miaow cat harness and leash is designed specifically for cats without a lot buckles. The cat harness and leash set is escape proof with durable, strong hook and loop fastener. It's lightweight, safe on delicate skin, easy to fasten & has no harsh webbing or buckles. This adjustable cat harness will fit your cat properly, it's a good cat vest harness if you choose the right size. Please refer to the second photo for size chart and measure your pet chest girth and neck girth. The package comes with harness, training leash and training guideline. We also added a lot videos on Amazon to help you with the cat leash training. Yizhi Miaow harness is very difficult to escape from if you learn to control the leash. You need to train your cat until the harness will act as a safety mechanism rather than a tool to drag your cat around with. It's normal that your cat will keeps falling over at the very beginning, please practicing 30 minutes indoor every or twice a day. Please refer to the video for cat walking training tips. Adjustable Cat Harness and Leash Set for Outdoor Walking Escape Proof - from professional cat harness producer