SIHOO Ergonomic Office Chairs have quietly become more popular—and it makes sense why. Many people like them because they offer good support and features without being too expensive. One of their most talked-about models is the SIHOO M18. It’s known for having a comfortable backrest and a smooth tilting motion that feels better than you’d expect for the price.
Then there’s the M57. It’s made entirely of mesh, which helps keep you cool while still offering solid support. The T3 takes things a step further—it looks more stylish and gives you more ways to adjust it to your body.
With so many affordable mesh chairs out there, SIHOO still manages to stand out. They gained attention when people started switching from padded chairs to mesh ones for better airflow during long work hours. But here’s what really matters—do these chairs actually live up to the promise?
Why Are SIHOO Mesh Chairs Getting So Popular?
If you search for ergonomic chairs in the $300–$500 range on Amazon, SIHOO shows up again and again. That’s not by chance—buyers often leave good reviews, especially for their comfort and support. But reviews can only tell you so much. That’s why we decided to try the chairs ourselves to see how well they actually work for daily use.
Build Quality of SIHOO Chairs
SIHOO M18
Sihoo M18 has metal base and frame provide a stable foundation, but the caster wheels feel lightweight and a bit flimsy—something you notice quickly when moving around. While the chair is clearly designed to be budget-friendly, the use of mostly plastic components (including adjustment levers and knobs) helps keep costs down without completely compromising on function.
The seat combines a fabric cushion with a mesh backrest, which is common at this price point but may not be as breathable or durable as full mesh options.
SIHOO M57
The M57 shares similar construction—a metal base paired with plastic wheels—but shifts to an all-mesh design, which many users will find more breathable for extended sessions. You can also opt for a foam seat variant if you prefer a little extra cushioning. The mesh used is fairly standard, so it’s not luxury-grade but does the job well for airflow and comfort.
SIHOO M90
The M90 is very similar to the M57 when it comes to build quality and mesh material, but it has a sharper, more modern design. It looks slimmer and more stylish, giving it a cleaner appearance. Even with the updated look, it still uses the same mix of metal and plastic parts, so the overall feel and strength remain about the same.
SIHOO V1: For Bigger Builds
The V1 model is SIHOO’s heavy-duty chair designed for bigger and heavier users. It features more metal parts throughout its frame and base, which gives it a much sturdier and more solid feel compared to other models. This extra metal makes the chair more durable and stable, so it can comfortably support higher weights without feeling flimsy. If you’re above average in size or simply want a chair built to last through years of use, the V1 is definitely worth considering.
Dimensions and Fit: Who Will These Chairs Actually Work For?
M18 Adjustability & Fit
The M18 offers a limited seat height adjustment range—roughly 18 to 21 inches—making it suitable for users from about 5’3” up to 5’10”. This range is narrow but covers a good chunk of average height users. The seat itself measures about 20 x 20 inches, which is generous enough for most body types, including those with thicker thighs.
One downside is the fabric seat’s texture, which is rougher than mesh and prone to static buildup. Comfort might improve after a break-in period, but some users may find the seat fabric less pleasant for long hours.
M57 Adjustability & Fit
The M57 extends seat height from roughly 18.5 to 21.5 inches, adding flexibility especially for users 5’4” to 6’1”. Its fully mesh design and wider seat area (about 24 x 25 inches) accommodate broader users better, providing increased comfort for larger builds compared to the M18.
M90 Fit & Dimensions
The M90 has a taller seat height range from 24 to 30 inches, making it a fit for users taller than 6’1”. However, its 19-inch seat width may feel restrictive for heavier or larger users, so it’s best suited for slender or average builds.
V1 Seat Dimensions
The V1 is the most accommodating with a wider seat and adjustable seat pan depth (up to 5 cm), designed specifically for heavier or taller users seeking more room and support.
Comfort: Mesh Quality, Cushioning & Support
M18 Comfort
The M18’s backrest mesh is relatively rough but does help with ventilation. The seat cushion is firm out of the box, requiring some time to soften. Lumbar support is adjustable but basic—good enough for most users but not tailored for heavy-duty ergonomic needs.
M57 Comfort
The Sihoo M57 chair mesh is softer and more flexible, creating a more comfortable sitting experience. The seat features memory foam padding on the edges, which helps reduce pressure on thighs during long sessions.
M90 Comfort
The M90 shares similar mesh quality with the M57 but features a stretchier backrest that moves more with your body, offering more dynamic lumbar support. This makes it feel more like a premium chair in terms of comfort.
V1 Comfort
The V1 stands out with a stronger, more resilient mesh that resists sagging and supports heavier users without losing shape. It also includes 2-way lumbar support and 4D adjustable armrests, elevating its ergonomic profile.
Adjustability: Customizing Your Sitting Experience
M18 Adjustments
- Headrest: Adjustable
- Armrests: Height-adjustable
- Tilt: Adjustable with lock (though tilt lock can be sticky)
- Lumbar support: Adjustable but limited
M57 Adjustments
- Headrest: Adjustable
- Armrests: 3D adjustable (up/down, side/side, front/back)
- Lumbar support: Adjustable tension
- Tilt: Adjustable with smoother lock
M90 Adjustments
- Headrest: Adjustable
- Armrests: 3D adjustable with added distance adjustment (requires unscrewing)
- Lumbar support: Non-adjustable, but flexible and dynamic
- Tilt and recline: Adjustable
V1 Adjustments
- Headrest: Adjustable
- Armrests: 4D adjustable
- Lumbar support: 2-way adjustable
- Seat depth: Adjustable
- Tilt and recline: Adjustable
Who Are SIHOO Chairs Best Suited For?
- Gamers and remote workers: The M57 and M90 offer enough tilt, recline, and ergonomic features to stay comfortable through long sessions.
- Budget-conscious buyers: The M18 is a solid pick with basic but useful features.
- Heavier or taller users: The V1 is built for durability and comfort for larger frames.
- Students: The M18 or M57 are great for online classes or study setups without overspending.
Comparison Of Sihoo Chairs
Our Pick
 Sihoo M57 |
Sihoo M18 |
 Sihoo M90 |
Sihoo V1 |
|
|---|---|---|---|---|
| Backrest Material | Mesh | Mesh | Mesh + Cushioned Lumbar Pad | 3D Dynamic Mesh |
| Seat Cushion | High-density sponge | Thick sponge cushion | Waterfall-edge sponge | W-shaped sponge seat |
| Adjustable Lumbar Support | Yes (height + depth adjustable) | Yes (basic) | Yes (independent knob-based) | Yes (auto-adjusting) |
| Headrest | 3D adjustable | 2D adjustable | 3D adjustable | 4D adjustable |
| Armrests | 3D (height, angle, width) | 2D (height, width) | 3D adjustable | 4D adjustable |
| Recline Function | 126° tilt with tension control | 125° tilt | 130° recline with lock | 135° recline with multi-position lock |
| Seat Height Adjustment | Yes | Yes | Yes | Yes |
| Max Weight Capacity | 330 lbs | 330 lbs | 330 lbs | 330 lbs |
| Best For | All-day comfort, smaller frames | Casual work, home offices | Long hours, lumbar-focused users | Executive-style ergonomic performance |
SIHOO’s M57 is often compared with the IKEA Markus. While the Markus is known for comfort, it lacks adjustability, making it less versatile. The M57 edges it out with more customization options, especially if you want a full mesh chair.
The M90 is sleek and ideal for taller, slimmer users but might not accommodate larger builds well.
For those needing durability and premium comfort, the V1 is an excellent choice, with features tailored for bigger users.
SIHOO Ergonomic Office Chairs Buyer’s Guide
Choosing the right SIHOO chair depends mainly on your body type, budget, and ergonomic needs:
- For average-sized users on a budget: The M18 offers solid basic ergonomics with a mesh back and fabric seat. Ideal if you want a comfy chair without too many bells and whistles.
- For more adjustability and breathability: The M57 is a step up with full mesh, 3D armrests, and adjustable lumbar support. Great for people who want more control over their comfort.
- For taller or slimmer users: The M90 offers a sleek design and taller seat range but is best if you’re under 6’4” and on the lean side.
- For bigger and heavier users: The V1 delivers heavy-duty build quality, wider seating, 4D armrests, and superior lumbar support — built to last and keep you comfortable all day.
Before buying, measure your height and seat preferences, and consider what adjustments you want most (e.g., armrests, lumbar support, tilt lock). Also, check weight limits to ensure the chair suits your frame.
Frequently Asked Questions (FAQ)
Q: Are SIHOO chairs good for long workdays?
A: Yes, especially the M57, M90, and V1 models. Their mesh design promotes airflow, and the adjustable tilt and lumbar support help reduce fatigue.
Q: How durable are SIHOO chairs?
A: They offer decent durability for the price, with metal bases and frames. The V1 is notably more robust, designed for heavier users.
Q: Can I get replacement parts?
A: Replacement parts are available from SIHOO or authorized sellers, but availability may vary by region.
Q: How hard is assembly?
A: Most SIHOO chairs come with clear instructions and tools. Assembly usually takes 20–30 minutes.
Q: Do these chairs fit taller people?
A: The M90 and V1 models are best suited for users above 6 feet, with the V1 better for heavier or larger users.
Final Thoughts: Is a SIHOO Chair Worth Buying?
For the price, SIHOO’s mesh chairs offer a lot. They’re comfy, breathable, and have the kind of ergonomic support you usually see in more expensive chairs. Sure, some parts feel a bit plasticky, and the fabric isn’t always super smooth—but overall, it’s a solid pick.
If you want a supportive office chair that won’t cost a fortune, SIHOO is definitely worth checking out.
