Designed by Laurastar's Swiss engineers, the protective sole protects sensitive materials and prevents shiny spots on dark fabrics. It also makes it possible to iron heat-sensitive fabrics such as silk. This is made possible by a special coating that reduces the heat of the iron soleplate. The protective soleplate can be easily attached to your Laurastar iron. First place the tip of the iron in the front part of the soleplate and then lower the iron to attach it to the back of the soleplate using the tab provided. Wait about 2 minutes until the sole has reached the correct temperature so that even delicate fabrics can be ironed gently.