The Catit Adjustable Harness & Leash Set is made from safe, comfortable and durable nylon material. The harness and leash are snag proof, which prevents them from tightening when snagged or scratched. Adjustment sliders on the harness allow for a quick customized fit. The bell warns prey of your cat's presence. The harness is easy to use and its quick release snaps allow you to remove it with ease.