Both chest and neck strap are soft and adjustable with Magic Tape enclosure. Measure your pet chest girth and neck girth, choose the RIGHT size for your pet, please refer to the second photo for size chart. | Escape proof cat harness with durable and strong Magic Tape. No buckles but the Velcro is very secure. Please refer to the video for cat walking training tips. | Padded harness is more safe than traditional leash, it will also makes your cat feel comfortable. | Practicing 30 minutes every or twice a day, it's normal that your cat will keeps falling over at the very beginning. | No harness is inherently 100% escape-proof. Only collar which may present a choking hazard can make it. You need to wait until the harness will act as a safety mechanism rather than a tool to drag your cat around with. You need to learn how to control the leash. Watch video online on Amazon will help you.