100% Silicone. Heat resistant up to 240 degree. Easy steam discharge due to pebbled surface. Prevents scorch (burn) marks on the iron base. Increases safety by minimizing hot iron surface exposure. Increases efficiency in reduces nind strain on wrist. Protects surfaces from hot iron. Contoured to mirror iron's shape. Non-sticky and non-slippery. Made from high quality silicon in the shape of iron. Protects surfaces from a hot iron Safe for use on ironing boards, tables or counters Raised dots help your iron cool faster. Protects surfaces from a hot iron Safe for use on ironing boards, tables or counters Raised dots help your iron cool faster.