TOPSTAR SITNESS 15 Silla de oficina ergonómica con tecnología 3D del asiento, reposabrazos ajustables en altura, base de aluminio pulido, negra

The TOPSTAR SITNESS 15 is an ergonomic office chair engineered for dynamic sitting and all-day comfort. Its standout feature is the patented Sitness-Technology, which allows a three-dimensional seat movement that actively engages your back muscles and promotes a healthier posture. The synchronous mechanism with weight adjustment ensures the chair adapts to your body weight for optimal support.

Advantages

Experience the benefits of active sitting: the 3D seat movement encourages micro-movements that relieve spinal pressure and improve circulation. The breathable mesh backrest keeps you cool, while the height-adjustable T-armrests and lumbar support provide personalized ergonomics. The polished aluminum base with load-dependent braked safety castors offers stability and safety on hard floors.

Suitable for

• Office professionals who sit for up to 8 hours daily
• Users seeking relief from back pain through dynamic sitting
• Workspaces with hard flooring requiring safe, non-marking castors
• Individuals up to 110 kg looking for a durable, GS-certified chair

Key specifications

• Synchronous mechanism with weight adjustment
• Seat height adjustment via Toplift gas spring (43–51 cm)
• Height-adjustable backrest with permanent contact
• Height-adjustable T-armrests
• Polished aluminum base
• Load-dependent braked safety double castors for hard floors
• Seat upholstery: 100% polyester fabric (black)
• Backrest: breathable mesh fabric (black)
• Integrated lumbar support
• Seat dimensions: 48 cm W x 48 cm D
• Backrest height: 58 cm
• Max user weight: 110 kg
• GS-certified by TÜV Rheinland

Recommendations

Pair this chair with a height-adjustable desk to alternate between sitting and standing. Regularly adjust the seat depth and armrest height to maintain an ergonomic posture. For optimal longevity, clean the mesh backrest with a soft brush and the fabric seat with a damp cloth.