TOPSTAR sedia da ufficio girevole ergonomica con meccanismo sincronizzato, nera

An ergonomic office swivel chair engineered for dynamic, all-day comfort. The synchronous mechanism synchronizes seat and backrest movement, while the innovative Sitness® joint promotes active sitting and strengthens back muscles. Height-adjustable armrests and a breathable polypropylene fabric cover complete this German-made seating solution, certified for safety and durability.

Advantages

The synchronous mechanism allows the backrest and seat to move in a fixed ratio, providing continuous support as you recline. The Sitness® joint encourages micro-movements that improve posture and reduce fatigue. Height-adjustable T-armrests relieve shoulder and neck tension, and the brake-loaded castors ensure stability on hard floors. GS and LGA certifications guarantee tested quality and safety.

Suitable for

• Office workers seeking ergonomic support during 8-hour shifts
• Home offices with hard flooring (wood, laminate, tile)
• Users up to 110 kg who value dynamic sitting
• Workspaces requiring durable, German-engineered furniture

Key specifications

• Synchronous mechanism with Sitness® joint for active sitting
• Seat height adjustable from 43 to 51 cm (stepless gas spring)
• Height-adjustable T-armrests
• Upholstery: 100% polypropylene fabric in black
• Robust polyamide base with brake-loaded double safety castors
• Backrest height: 57 cm; seat dimensions: 48 x 48 cm
• Maximum user weight: 110 kg
• Certifications: GS-tested, LGA-tested
• Made in Germany

Recommendations

For optimal ergonomics, adjust the seat height so your feet rest flat on the floor and your knees form a 90° angle. Use the Sitness® joint to vary your sitting position throughout the day, engaging core muscles and reducing spinal pressure. Pair with a height-adjustable desk for a complete active workspace.