There are no metal parts in this garment, which makes it soft and comfortable for your baby. Next to that our jumpsuit is made of GOTS-certified cotton, meaning that it is made from organic cotton, no harmful chemicals are used and the garment is made under fair working conditions. When washing this jumpsuit, please close the fastener. This will prevent lint and fluff getting stuck on the fabric. Should you forget this you can easily remove lint and fluff with a lint roller.