This two - piece set is super easy to use. Just put on the button - up top by fastening the buttons one by one, and then slip into the pants. When it comes to washing, always use cold water in the machine to keep the colors bright and the fabric in good shape. Set the dryer to a low tumble - dry setting to prevent any shrinkage. Make sure to check the size chart before buying to get the perfect fit for your little one. Also, avoid ironing directly on the buttons to keep them in good condition.