To use this baby onesie, just gently put it on your little one. The bottom popper fastening makes it easy to dress and undress your baby. When it comes to maintenance, remember to always wash it inside out in cold water. This helps to keep the colors vibrant and the fabric soft. You can tumble dry it on low, but avoid high - heat settings as they might shrink the onesie. Keep in mind that this onesie is made of 100% soft cotton, so handle it with care to ensure its longevity. Also, check the poppers regularly to make sure they are in good condition.