The tractive fastener is made from a tough durable semi-rigid TPU that will put up with anything your pet can do to it. Our unique design encases the Tractive GPS Tracker in our fastener to ensure it stays on your pet. This Fastener is part of our traditional fastener line which includes our Fi Fastener. The split loop allows for the fastener to be attached to any collar or strap up to 1.25 inches wide. Available in White, Black, Gray, and Orange