Made of high-density foam sponge, high resilience sponge, moderately soft and hard, good resilience, no deformation. The shape of the sponge is both modern and ergonomic. It is comfortable to sit. Clean and convenient: with a soft and moderate towel can be removed from the surface of the dust, generally do not need deliberate maintenance. When the surface is stained, it can be wiped with a clean cloth or special fabric cleaner according to the instructions.