Using this dog t - shirt is easy. Just slip it over your dog's head and adjust it to fit comfortably. Make sure it's not too tight around the neck or body. When it comes to washing, it's best to use a gentle cycle in cold water to preserve the colors and the quality of the fabric. Avoid using bleach or harsh detergents. After washing, you can tumble dry on low heat or let it air dry. Keep it away from sharp objects to prevent any tears. If your dog grows, you may need to get a larger size. This t - shirt is officially licensed, so you can be confident in its quality and authenticity.