TOPSTAR Sitness Bob actieve kruk blauw SU49 G26

A graphic designer shifts her weight from side to side while sketching, a home worker bounces lightly during a long video call—the TOPSTAR Sitness Bob Active Stool in blue (SU49 G26) turns those small movements into a workout for your back. Its flexible 3D joint lets the seat tilt in every direction, engaging your core and keeping your spine aligned even after hours of sitting.

Key specifications

• Type: Active stool with 3D movement (Sitness technology)
• Colour: Blue
• Seat material: Fabric (100% polyester)
• Base material: Polyamide (plastic)
• Height adjustment: Gas spring, stepless from 420 to 560 mm
• Seat diameter: 400 mm
• Base diameter: 400 mm
• Maximum user weight: 110 kg
• Special features: Promotes active sitting, strengthens back muscles
• Certification: GS-certified (TÜV Rheinland)
• Country of manufacture: Germany
• Mechanism: Flexible joint for dynamic sitting
• Seat padding: Ergonomic foam padding
• Glides: Floor-friendly glides
• Assembly required: Minimal

Why choose it

The Sitness Bob is more than a stool—it's a tool for better posture. The 3D movement encourages micro-movements that boost circulation and reduce fatigue. The ergonomic foam padding keeps you comfortable, while the sturdy polyamide base and floor-friendly glides protect your floors. With GS certification from TÜV Rheinland, you know it meets strict safety and quality standards.

Ideal use cases

• Office workstations where you want to stay active while typing or on calls
• Home offices for short, dynamic sitting sessions
• Creative studios where movement fuels inspiration
• Reception areas or collaborative spaces that encourage informal, active seating

Good to know

Manufactured in Germany, this active stool combines quality craftsmanship with innovative ergonomic design. The 3D joint allows a full range of motion, and the stepless gas spring height adjustment ensures a perfect fit for users of different heights. Minimal assembly means you can start enjoying the benefits of active sitting almost immediately.