Sponge: 4 mm upper fabric: Velvet fabric is produced with nano technology and has a smooth surface. It does not slip on any surface. The bristles do not collect dust and fluff and are very easy to clean. It can be wiped clean even with a soapy cloth and machine washable. It does not cause shedding. It looks lively and bright. It has a velvety surface. It has a structure that is suitable for all seasons, is non-allergic and does not irritate the skin. It has a plump and distinctive surface. intermediate sponge: 4 mm upper part: Velvet shiny fabric, weighs 130 g per square meter. lower base: Dod sole, total thickness: 7 - 9 mm. The pattern repeats in the runner sizes (longest, shortest).