New and High Quality Bamboo Charcoal Breathable Seat Cushion for Office Car Chair Z1 (Black) Bamboo Imported Size: 45*45cm (17.5 * 17.5 inch) Inner material: Bamboo Charcoal Surface material: synthetic fibre Charcoal is a pure natural product and it is non-toxic, tasteless, no side effects. Package including 1 x seat mat