Office chair Topstar Big Star 20 XXL Black BT290T W50 — XXL ergonomic seating, black

The Topstar Big Star 20 XXL (BT290T W50) is an XXL office chair designed for larger users and rated for up to 150 kg. It features an extra-high, thickly padded seat with a knee roll and a 70 cm high backrest. The chair includes a polished aluminium star base, height-adjustable armrests with Softpad arm covers, and a synchronized mechanism for coordinated seat and back recline to improve sitting comfort during prolonged desk work.

Advantages

The Big Star 20 XXL provides reinforced components designed for higher load capacity and an ergonomic, extra-padded seat for improved pressure distribution. The tall 70 cm backrest supports the upper back and shoulders, while the synchronised mechanism promotes balanced recline and posture adjustments. Polished aluminium base and soft arm pads combine durability with a comfortable contact surface.

Suitable for

• Office work for larger or taller users
• Home office with extended sitting periods
• Workplaces requiring robust, higher-load seating

Key specifications

• Brand: Topstar
• Model / MPN: BT290T W50
• EAN: 4014296241890
• Load capacity: up to 150 kg
• Backrest height: 70 cm
• Seat: extra-high, heavily padded with knee roll
• Mechanism: synchronised (synchron-Mechanik)
• Base: polished aluminium star base
• Armrests: height-adjustable with Softpad covers
• Colour: black

How to use

Adjust the seat height so your feet rest flat on the floor and knees are approximately at a right angle. Set the armrest height to align with your desk or to support relaxed shoulders. Use the synchronised mechanism to find a comfortable recline and lock the chair in the desired position if needed. The knee roll on the seat supports the front thigh area; position yourself so that the padded edge does not press uncomfortably against the underside of the knees.

Usage recommendations

For prolonged use, combine correct seating posture with regular short breaks and small posture changes. Periodically check fastenings and adjustment mechanisms for wear if the chair is used under higher loads.