Using this harness is simple. Just help your pet step into it and then fasten the quick - release buckle. Adjust the black plastic slides to get the perfect fit. Remember to measure your pet's girth behind the front legs to pick the right size. When using, make sure the harness isn't too tight to avoid discomfort for your pet. For maintenance, you can gently hand - wash it with mild soap and let it air dry. Don't use harsh chemicals or machine - wash it, as this may damage the nylon and hardware.