Office chair Topstar High Sit up — black, fixed armrests, high backrest

Topstar High Sit up office chair in black with fixed armrests and a high backrest. The chair features an ergonomic backrest with an integrated leather headrest, a contoured seat, and a stable steel base. It is upholstered in 100% polyester with a 3D appearance and includes safety double casters that are GS-tested. Dimensions: width 480 mm, depth 460 mm, seat height 440–520 mm; backrest height 700 mm.

Advantages

The fixed armrests provide consistent forearm support, while the Kniematic tilt mechanism supports dynamic sitting and helps maintain an ergonomic posture. A reinforced steel five-star base ensures stability and the contoured seat improves weight distribution. Safety double rollers increase mobility without compromising safety, and the integrated leather headrest adds additional neck support.

Suitable for

• Office desks and computer workstations
• Meeting and conference rooms
• Home offices and study areas
• Tasks requiring prolonged sitting with moderate movement

Key specifications

• Brand: Topstar
• Model / MPN: SU39A-BG0
• Colour: Black
• Upholstery: 100% polyester, 3D look
• Seat dimensions (W x D): 480 x 460 mm
• Seat height: 440–520 mm
• Backrest height: 700 mm
• Armrests: fixed
• Mechanism: Kniematic tilt
• Base: steel five-star base
• Casters: safety double rollers, GS-tested
• EAN: 4014296986210

How to use

Adjust the seat height to position your feet flat on the floor and your thighs roughly parallel to the ground. Sit back so the ergonomic backrest and integrated headrest support your spine and neck. Use the fixed armrests to rest your forearms at approximately desk height. The Kniematic tilt mechanism allows slight reclining; lean back gently to engage the tilt and maintain movement while seated. Roll the chair on a suitable floor surface using the safety double casters.

Usage recommendations

For optimal ergonomic benefit, pair the chair with a desk adjusted to elbow height and take regular short breaks to stand and stretch. Use on hard or low-pile carpet; consider protective floor matting on soft carpets to ensure smooth rolling and protect the floor.