Introduce your cat to the costume by leaving it out in their space. Let them get familiar with the feel and scent of the outfit. When you are ready to try it on them, we recommended having treats on-hand to redirect your cat's attention. If the costume goes over the head, like a t-shirt, put your cat's head through first and then carefully place their front legs into the sleeves. Stay calm, be patient, and make sure the costume isn't too tight.