This personalized long - sleeve baby onesie is really easy to use. Just put it on your little one through the bottom popper fastening. It's so soft that your baby will feel super comfortable all day. When it comes to maintenance, you can machine - wash it inside out in cold water. This helps keep the fabric soft and also protects the personalized design. Then, tumble dry it on a low setting. Don't use hot water or high - heat drying as it might shrink the onesie or damage the fabric. Also, keep in mind that because it's for a baby, always make sure to check for any loose threads or parts before dressing your baby in it. Enjoy this cute onesie with your little bundle of joy!