Sigma Mesh Chair

Long-session mesh comfort with a premium chrome-base finish – The Sigma Mesh Chair is a medium-back task operator armchair designed for extended desk days, combining an AIRFLOW mesh backrest with an adjustable mesh headrest for breathable, supportive contact where it matters most.

Rated for up to 10 hours with lockable full recline – Built for up to 10 hours’ daily use and rated to 130 kg, Sigma features gas-lift height adjustment, tilt tension + tilt lock, and a fully reclining back function you can lock in position—set on a polished chrome five-star base with smooth PU castors for a refined, dependable setup.

Key Highlights:

• Adjustable mesh headrest to fine-tune upper-neck and head support

• Breathable AIRFLOW mesh backrest for cooler long sessions

• Up to 10-hour daily usage rating for extended workdays

• Tilt tension + tilt lock + full recline for controlled movement or fixed focus

• 130 kg rating for dependable stability

• Polished chrome five-star base + PU castors for a premium finish and smooth mobility

Supportive fit with practical, repeatable controls – Sigma focuses on the adjustments that make the biggest difference for longer sessions, helping you maintain a comfortable, upright sitting position while giving you the option to recline and lock in.

• AIRFLOW mesh backrest with lumbar shaping: Encourages supportive contact through the back while promoting ventilation

• Adjustable mesh headrest: Fine-tune neck and upper-back support to suit your height and monitor setup

• Fixed sturdy armrests: Consistent forearm support during keyboard and mouse work

• Gas-lift seat height adjustment: Set height so feet sit flat and knees sit comfortably aligned

• Tilt tension + tilt lock: Calibrate recline resistance to your bodyweight and lock into your preferred angle

• Fully reclining back function: Lean back between tasks while keeping movement controlled and supported

Technical Specifications

Delivery, returns & what’s included

• Free tracked UK delivery — typically 1–3 working days flat-packed.
• Optional fully assembled delivery — have your chair delivered fully built instead of flat-packed (select before Add to Cart). Delivery is to your door (kerbside), in one large box: you’ll need to bring the chair inside, and the packaging is not taken away. An assembled delivery takes longer than flat-packed. Isle of Wight, Scilly, a Scottish island or Northern Ireland? Please email info@apexcomfort.co.uk before ordering assembled delivery.
• 14-day returns policy — see the full policy for details.
• 2-Year manufacturer’s warranty (defects in materials and workmanship; fair wear and tear and misuse excluded), coordinated directly by Apex with UK-based support.
• The Apex Ergonomics Pack — complimentary with every chair: our 6-page guide to setup, posture and chair care, emailed after your order.

Every Apex Comfort chair includes your complimentary 6-page Apex Ergonomics Pack — emailed automatically once your order is confirmed. A concise, practical guide to setting up and getting the most from your chair, so it delivers the support you paid for from day one.

Inside the pack

• 10-minute desk & chair setup checklist — set height, posture and screen position correctly the first time.
• Visual posture reference — keep it to hand through long working days.
• Movement breaks & desk stretches for long working days.
• Chair care & maintenance — how to clean and look after your chair.

Why it matters

A chair only works as well as it is set up. This guide covers the small adjustments that make the biggest difference to how your chair fits you.

How you receive it

Place any order and we'll email your download link as soon as your order is confirmed. Open it on your phone, tablet or laptop and follow the steps as you set up your chair.

The Apex Ergonomics Pack comes only with an Apex Comfort order.