The Topstar Support SY is an office chair constructed with an 88% PVC and 12% cotton artificial leather upholstery over a chromed steel base. It features a synchronous tilt mechanism, a continuously adjustable seat height from 42 to 55 cm, and a load capacity of 110 kg. The wedge-shaped seat and high, contoured backrest provide structured spinal and pelvic support for up to 8 hours of daily use.