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 is suitable for all seasons - it has a non-allergenic and non-irritating structure. 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 size of the runner (long, short and wide).