DXRacer KX28/NB King Racing Bucket Seat Office Chair Gaming Ergonomic with Lumbar Support (Blue) Ergonomic design - more efficient and comfortable, with bonus headrest cushion & lumbar support cushion Extra high backrest to support neck and spine, Flexible seat back with adjustment Special soft armrests with adjustable pieces to comfort shoulders and wrists Patent race car seat design with breathable material: Smooth polyurethane vinyl, strong mesh and soft PU cover Newly designed heavy duty aluminum base with latest footrests and a conventional tilt mechanism