8 in. mattress with ergonomic design conforms to body curves to reduce the stress on your spine and joint after long hours of working. Topped with an ultra-soft quilted and breathable cover, it keeps air flow without stuffy feeling. The highly elastic air foam and PU foam make it excellent in added comfort and long-lasting durability. Thanks to the non-slip bottom, you don't have to worry about the bed mattress slipping off accidentally. Also, the washable and removable cover with durable zipper allows you to care easily. Just move box to desired room, slide mattress out of box, unroll mattress onto base, and you can start sweet dreams. Size: medium. Color: White.