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 to reduce shoulder loading 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.
• Optional White Glove delivery & assembly — have your chair delivered fully built, to the room of your choice (select before Add to Cart). An assembled delivery takes longer than flat-packed; we confirm the date when you order.
• 14-Day Hassle-Free Returns if the chair isn’t the right fit for you (see full policy for details).
• 2-Year manufacturer’s warranty, 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 — reduce stiffness during extended sessions.
• Chair care & maintenance — keep your chair performing and looking its best for years.

Why it matters

Even a well-engineered chair won't help if it's set up incorrectly — you'll carry the same aches into a new chair. This guide covers the small, high-impact adjustments that fix the cause, not the symptom, so your chair delivers the comfort and support it's built for.

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 is available only to Apex Comfort customers — not included when the same chairs are bought from general retailers or marketplaces.