Office chair SUNFLEX HB Onyx Black, ergonomic high-back model, brand SUNFLEX

The SUNFLEX HB Onyx Black office chair is an ergonomic high-back model designed for desk-based work. Its tall backrest supports the upper and lower spine to promote better posture during prolonged sitting. The chair is intended for general office tasks, meetings and workstation use in home or corporate environments and is compatible with standard office chair bases and adjustable mechanisms provided by the manufacturer.

Advantages

The high-back design offers extended lumbar and shoulder support while the contoured seat distributes weight evenly to reduce pressure points. The chair's ergonomic shape helps maintain a neutral spine alignment and minimizes muscle strain during long periods of sitting. Built for everyday office use, the model balances support and mobility suitable for varied work activities.

Suitable for

• Office desk work and computer tasks
• Home office and remote workstations
• Meetings and conference rooms
• General administrative and clerical duties

Key specifications

• Type: Ergonomic high-back office chair
• Backrest: High-back profile supporting upper and lower back
• Intended use: Desk and workstation seating for extended sitting
• Compatibility: Fits standard office chair bases and adjustable mechanisms
• Color: Onyx Black finish

How to use

Adjust the seat height so your feet rest flat on the floor and your knees are roughly at a 90° angle. Position the backrest to support the natural curve of your lower back; if the chair includes adjustable lumbar or tilt features, fine-tune them to maintain a neutral spine. Keep the seat depth and arm height aligned with your desk to allow relaxed shoulders and forearms while typing or using a mouse. For prolonged sessions, stand and move periodically to reduce static loading on the spine.

Usage recommendations

Use the chair on a hard, level surface or with a protective floor mat on carpeted floors. Inspect and tighten any adjustable fittings periodically according to the manufacturer's instructions. For optimal ergonomics, combine seat adjustments with an appropriately positioned desk, monitor and keyboard.