Sihoo M18, a time-tested ergonomic office chair designed with a w-shape cushion, a breathable mesh seatback, and dual-adjustable lumbar support, among other features. This chair makes ergonomic comfort effortless and within reach, making it an excellent choice to begin your journey towards comfortable and healthy seating.
W-shaped cushion for soft and cozy seating
Breathable mesh back that keeps you cool
Dual-adjustable lumbar support for continuous lower back comfort
Max. 126° recline angle to lounge in comfort
Height-adjustable armrests that suit your needs
M18 Classic Office Chair - White
Couldn't load pickup availability
Share:
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Key Features
Full breathable mesh design
Contoured backrest
Dual-adjustable lumaber support
Dual-adjustable lumbar support
Sit in softness
The cushion of M18 is crafted from high-quality sponge and shaped like the letter W, ensuring an exceptionally plush and cozy seating experience.
Stay cool
M18's seatback is crafted from breathable mesh, promoting excellent airflow and preventing perspiration and discomfort, especially during scorching summer weather. This feature ensures a cool and pleasant seating experience, guaranteeing your comfort at all times.
Lumbar support that suits you
Effortlessly adjust the lumbar support both vertically and horizontally, achieving an ideal fit to the curvature of your spine for constant support and comfort.
Relieve the burden on your shoulders
Sihoo M18 allows you to keep your arms rested and relaxed as you work. Moreover, you have the option to adjust the armrests to your preferred height.
Recline in comfort
Relax and unwind in the Sihoo M18 chair, which provides a generous maximum recline angle of 126°, enabling you to luxuriate in absolute comfort."
Support for your thoughts
Sihoo M18's headrest adjusts 3.9" vertically and pivots 45° to provide a customizable fit for your neck, supporting your head in various postures.
"All of this amounts to a really crazy experience when it comes to the arm adjustability. Most chairs have a completely flat arm but with this the sweep seems to give a little bit more support to my whole arm rather than just my elbow which is rather nice."
★★★★★
"These flexible plates allow the Doro S100 seat to be tilted smoothly and at any angle for resting, then returned to the initial position without any effort or twisting of the back."
★★★★★
"...with an “anti-gravity mechanism” that allows the chair to smoothly move and stop at any angle without needing to be locked into place."
Sihoo M18, a time-tested ergonomic office chair designed with a w-shape cushion, a breathable mesh seatback, and dual-adjustable lumbar support, among other features. This chair makes ergonomic comfort effortless and within reach, making it an excellent choice to begin your journey towards comfortable and healthy seating.
W-shaped cushion for soft and cozy seating
Breathable mesh back that keeps you cool
Dual-adjustable lumbar support for continuous lower back comfort
The Sihoo M18 has great back support that you can change to fit your body. You can move it up and down, and you can also push it forwards or backwards to match the curve of your spine. This means your lower back stays comfortable all day long.
What height and weight should I be to use this chair properly?
This chair works best for people between 150-180 cm tall (5' to 5'11"). It can also hold up to 136 kg (300 lb) safely. These measurements make sure the chair gives you the best comfort and support.
Does the mesh material get hot? Will I be sweaty in summer?
No, it stays cool. The chair uses special mesh fabric that lets air flow through it easily, keeping your back and bottom cool and dry even when it's warm. You won't get that sticky, uncomfortable feeling you get with leather chairs.
Is the chair hard to put together?
Not at all - it's really easy. The chair comes with clear instructions and all the tools you need, and most people can build it in 15-20 minutes by themselves. We also have a video to help you if you get stuck.
What happens if I don't like the chair or something goes wrong?
We want you to be happy with your chair. You can return it within 30 days if you're not satisfied, no questions asked. The chair also comes with a 3-year guarantee, and some parts like the gas lift have an even longer warranty.
Can I change the armrest height?
Yes, you can adjust them. The armrests move up and down with the seat height, going from 44 cm to 54 cm above the floor. This means they'll match most desk heights perfectly and support your arms properly.
What makes this chair better than other office chairs?
The Sihoo M18 combines smart design, good materials, and fair pricing. Here's what makes it special:
Smart Support: The back support moves with your body as you shift around. This keeps your spine in the right position all the time, unlike chairs that only offer basic support.
Comfortable Seat: The W-shaped seat spreads your weight evenly. This stops pressure building up on your hips and legs, giving you comfort that usually costs much more.
Built to Last: Every chair uses tested, certified parts including a strong gas lift and solid base. This means the chair is safe, reliable, and will last for years.
The Sihoo M18 gives you all the important features of expensive office chairs without the high price. This makes professional comfort available to more people.
Reviews
Customer Reviews
Overall rating: 4.8 / 5 from 222 reviews.
Really comfy and perfect for my home office. Great support. So glad I chose this - definitely recommend!
This is a very comfortable ergonomic chair to WFH, especially as I have back issues.
I would have liked a slightly longer seat but I don’t mind as it is.
The instructions were easy to follow, fast delivery, great service overall.
Thanks!
Bought this chair for my son who is currently doing A levels. Delivery was next day. My son loves it, its very sturdy and comfortable. Highly recommend chair
Great chair , comfortable and for the price I love it. Not willing to spend £1000+ on a chair just for sitting. This is definitely on the cheaper side but has all the features you would need, whilst being comfortable. Happy with the money spent here!
This product is fantastic! I work at home for long hours and I have a bad back. I don't have any back or neck pain when using it. The customer support team are also fantastic! I lost the screw set when moving house, and I explained what happened and it's still under warranty, and they will send me a new screw set. A fantastic experience all around, totally recommend!
- Reuben
Pretty easy to put together. Comfy chair and like the fact the arm rest are adjustable. A shame you can’t adjust how far forward the back rest comes, you can only make it lean backwards which isn’t useful for me. Unsure about the longevity of it as the materials do not feel the best.
Delivery took quite a while but when it arrived it was exactly what my daughter wanted. Comfortable to sit in for long periods while she is studying, and the white and grey colouring blends into her light room decor nicely. Great quality chair.
I bought my previous Sihoo chair in 2022 the mesh on the bottom was beginning to ware and my back was under a lot of strain for my tech job, I ordered a new m18 and the product quality had improved significantly while the price point remained similar since my new chair arrived my back has been so much better and my sitting posture has improved. I honestly recommend these chairs to people constantly they just keep getting better.
Very comfortable and easy to assemble. The headrest isn't very secure, though; the smallest bit of pressure can cause it to shoot down all the way, and when you try to readjust it, you pull it all the way out.
Sihoo M18, a time-tested ergonomic office chair designed with a w-shape cushion, a breathable mesh seatback, and dual-adjustable lumbar support, among other features. This chair makes ergonomic comfort effortless and within reach, making it an excellent choice to begin your journey towards comfortable and healthy seating.
W-shaped cushion for soft and cozy seating
Breathable mesh back that keeps you cool
Dual-adjustable lumbar support for continuous lower back comfort