The protective sole was designed by Swiss engineers from Laurastar. It protects delicate fabrics and prevents shiny spots on dark materials. Additionally, it allows for ironing heat-sensitive fabrics such as silk. This is made possible by a special coating that reduces the heat from the soleplate of the iron. The protective sole was specifically developed for Laurastar's 3D iron and is very easy to attach. First, place the tip of the iron in the front part of the protective sole, then lower the iron to secure it at the back of the sole using the designated tab. Wait about 2 minutes for the sole to reach the right temperature to gently iron delicate fabrics. Compatible with Laurastar Pulse Silver, Laurastar Pulse, and Laurastar S7a ironing systems, as well as the Laurastar G7 steam ironing station.