Sihoo M57 vs M18: Which Ergonomic Chair is Right for You?

When it comes to ergonomic office chairs, Sihoo has carved out a strong reputation for delivering comfort, durability, and smart design without the premium price tag. Among its most popular models, the Sihoo M57 and Sihoo M18 stand out as two excellent contenders for anyone who spends long hours at a desk—whether working, studying, gaming, or creating.
But with both chairs offering impressive features at budget-friendly prices, a common question arises: Which chair should you choose, the Sihoo M57 or the Sihoo M18?
In this detailed comparison, we’ll break down everything you need to know about these two chairs. From design and adjustability to comfort and certifications, we’ll explore their similarities, differences, and who each chair is best suited for. By the end, you’ll know exactly which chair deserves a place in your office or gaming setup.

First Impressions and Design Philosophy

Sihoo M57: Sleek and Functional

The Sihoo M57 is built with a fully breathable mesh design, making it sleek, lightweight, and ideal for warmer environments where airflow is key. Its streamlined backrest extends to provide full back support, while the 3D adjustable armrests instantly catch your attention. This chair is about adaptability—it’s designed to shift along with your posture, ensuring you stay supported no matter how you sit.
Visually, the M57 feels modern and minimalistic, a chair that blends effortlessly into both office and gaming setups. It’s the kind of chair that communicates functionality first, without compromising on comfort.

Sihoo M18: Classic Comfort

By contrast, the Sihoo M18 leans toward a more traditional ergonomic chair design. While it still incorporates mesh in the backrest for breathability, the seat itself is soft and cushioned, giving it a more “classic office chair” feel. Instead of 3D armrests, the M18 features height-adjustable armrests, which are simpler but still versatile for most users.
The M18’s focus is clear: comfort, especially for those who prefer a more plush seat cushion over a fully mesh build. Its design language is slightly less modern but warmer and more inviting for long seated hours.

Adjustability: Finding Your Perfect Fit

M57 Adjustability

The M57 shines in terms of adjustability, thanks to its 3D armrests. You can move them up and down, forward and backward, and side to side. For people who switch between typing, reading, and relaxing, this versatility can make a huge difference in long-term comfort.
Its adjustable lumbar support also allows you to fine-tune the lower back support, ensuring your spine is aligned throughout the day. And with a recline of up to 126°, it offers a comfortable break position without going overboard into lounge-chair territory.

Sihoo M57 Office Chair

The Sihoo M57's full mesh construction ensures superior airflow, keeping you cool and preventing sweat and discomfort even in hot weather.

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M18 Adjustability

The M18 provides height-adjustable armrests, which are simpler but still effective for most users. The real star here is its dual-adjustable lumbar support, which gives you the ability to adjust both the height and depth of the lumbar system. This can be particularly valuable if you have specific lower back concerns or prefer very targeted support.
It also reclines up to 126°, giving you the same lean-back relaxation options as the M57.
Verdict: If you prioritize armrest flexibility, the M57 wins. If you want more customizable lumbar support, the M18 has the edge.

Sihoo M18 Office Chair

Sihoo M18 features a cushioned seat and breathable mesh backrest to provide a balance of soft comfort and cool airflow, even during long hours of sitting.

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Comfort: Mesh vs Cushion

Comfort is highly subjective, but here’s how the two compare:

• Sihoo M57: Full mesh design keeps you cool and prevents sweat buildup during long sitting sessions. The mesh is firm but supportive, which some may find slightly less plush than cushioned chairs. Best for hot climates or users who prioritize breathability.
• Sihoo M18: Combines a soft, cushioned seat with a breathable mesh backrest. This hybrid approach gives you the comfort of a padded seat without sacrificing airflow. Ideal for users who want a balance between plush comfort and breathability.

If you’ve ever felt that a full mesh chair is too stiff, the M18 may feel more inviting. But if you dislike cushion compression over time, the M57’s mesh ensures consistent support.

Endorsements and Credibility

Both chairs have been reviewed and recommended by top tech and lifestyle outlets:

• Sihoo M57: Endorsed by Creativebloq, TechRadar, ExpertReviews, and others as one of the best budget-friendly ergonomic chairs.
• Sihoo M18: Endorsed by Creativebloq, TechRadar, GamingTrend, MMORPG, and more. The M18 has slightly stronger ties with gaming-related publications, which speaks to its comfort appeal for long gaming sessions.

Endorsements matter because they reflect hands-on reviews by trusted sources. The M57 gets more recognition for its affordability and functionality, while the M18 earns praise for gaming and long-hour comfort.

Recline and Relaxation

Both chairs feature a 126° recline, which is great for short breaks, brainstorming sessions, or leaning back during calls. While neither chair is designed to replace a recliner, this range strikes a balance between productivity and relaxation.
For users who want a true "weightless" recline (similar to Sihoo’s premium Doro series), you’ll need to look beyond these two models. But for their price points, both the M57 and M18 deliver reliable reclining comfort.

Who Should Choose the Sihoo M57?

The Sihoo M57 is best suited for:

• Hot climates or sweaty environments – thanks to its full mesh build.
• Users who value versatile armrests – the 3D adjustments provide multiple ergonomic options.
• Minimalists who want a modern, streamlined look.
• Budget-conscious buyers who still want SGS + BIFMA certifications for extra reassurance.

The M57 is essentially the all-rounder chair, balancing comfort, airflow, and adjustability without leaning too heavily toward any one feature.

Who Should Choose the Sihoo M18?

The Sihoo M18 is best suited for:

• Users who sit for long hours and prefer a cushioned seat.
• People with specific lower back needs, thanks to the dual-adjustable lumbar system.
• Gamers and students, who often spend extended sessions seated.
• Buyers who want a blend of mesh and cushion, rather than committing to one.

The M18 is the comfort-focused office chair, making it a better fit for people who want plush support over firm mesh.

Side-by-Side Feature Comparison

Long-Term Considerations

Durability

• M57 Mesh: Mesh can last a long time but may sag if heavily used without proper care.
• M18 Cushion: Cushions can flatten over time, especially if heavily used.

Maintenance

• Mesh (M57): Easier to clean and doesn’t trap dust as much.
• Cushion (M18): Requires occasional deep cleaning, especially in humid or dusty environments.

Final Verdict: Sihoo M57 vs M18

Choosing between the Sihoo M57 and Sihoo M18 comes down to your personal preferences and daily habits:

• If you want versatility, airflow, and modern simplicity, go with the Sihoo M57.
• If you prefer plush comfort, deeper lumbar customization, and a chair that feels inviting for long sessions, choose the Sihoo M18.

Both chairs deliver excellent value for money, strong certifications, and the kind of ergonomic support you’d expect from much more expensive brands.
At the end of the day, you can’t go wrong with either. It’s less about which is “better” and more about which matches your comfort style: mesh firmness or cushioned coziness.