Sihoo M59AS vs M18: My Honest Personal Review

Last Updated on October 7, 2025 by Cassie Moorhead

When comparing the SIHOO M59AS vs M18, it’s clear both chairs aim to improve comfort and posture. From my experience, the M59AS offers more adjustability and a firmer support, while the M18 feels softer and easier to settle into for long hours. I’ve spent weeks using both, and each has strengths depending on your desk setup and daily routine. For anyone in the USA working from home or in an office, knowing the differences helps you choose a chair that truly fits your needs. In short, this guide breaks down the key features so you can pick the right ergonomic chair confidently.

SIHOO M59AS Review

The SIHOO M59AS is an ergonomic office chair that puts comfort first. I’ve been using it for long desk days, and it feels easy on the back and shoulders. Unlike my heavy leather chair, this one is light, airy, and built for posture.

The first thing I noticed was the lumbar support. It adjusts as I lean back, which helps my lower back feel supported. The double back design also keeps my spine straight when typing.

I also liked the flip-up armrests. Sometimes I cross my legs or play guitar during breaks. With the armrests out of the way, I have more space. For typing, I flip them down for steady support.

In short, the SIHOO M59AS works well for long hours. It feels simple, flexible, and dependable for daily office use.

To buy this product, Click here.

What I Like

• Breathable Mesh: The mesh keeps me cool. I don’t feel sticky after long hours.
• Steady Support: The lumbar system moves with me. It keeps my back in place without pressure.
• Flexible Armrests: I flip them up when I want space. I flip them down when I type.
• Strong Build: With BIFMA and SGS certification, I trust its safety and long use.

What Could Be Better

• Tools in the Box: The included wrench is small. A stronger one would make setup easier.
• Seat Firmness: The cushion feels firm at first. Softer padding could help some users.
• Headrest Range: Works best for users under 6’3″. Taller users may need more height.

Is SIHOO M59AS Good?

Yes, it is. This chair gives real comfort during long workdays. I’ve sat in it for over 8 hours, and my back felt fine.

The mesh design keeps air flowing. The double back helps posture. The armrests and headrest adjust for daily needs. It also holds up to 330 lbs, which makes it sturdy for most people in the US.

SIHOO M59AS Overview

Feature	Details
Brand	SIHOO
Model	M59AS Ergonomic Office Chair
Seat & Back	Breathable elastic mesh
Armrests	3D flip-up, padded
Lumbar Support	Adaptive dynamic lumbar with spring system
Backrest	Double back design
Headrest	Height and tilt adjustable
Weight Capacity	330 lbs
Certifications	BIFMA & SGS
Assembly Time	About 20 minutes

Recommendation

The SIHOO M59AS is best for people who work long hours at a desk. It’s a smart choice if you want breathable mesh, strong lumbar support, and armrests that move out of the way.

If you are taller than 6’3″ or like very soft seats, you may want another SIHOO model. But for most office workers in the US, it gives the right mix of comfort, support, and value.

From my use, it feels like a chair made for health and daily life.

To buy this product, Click here.

SIHOO M18 Review

The SIHOO M18 is an ergonomic office chair that balances comfort, build quality, and affordability. I’ve been using it for long work sessions, and it has proven to be reliable. From video calls to late-night writing, it helps me stay focused without the usual back pain I used to get from cheaper chairs.

What stood out first was the breathable mesh back. It feels comfortable even after hours of sitting, especially during warm days. The seat cushion is soft but supportive, and the adjustable headrest adds that extra bit of neck relief when I lean back.

If you’re someone who spends long hours at a desk—whether working from home or in an office—this chair hits a good balance between price and ergonomics.

To buy this product, Click here.

What I Like

• Solid build quality – The chair feels stable and well-constructed. I don’t worry about the wheels falling off or the gas cylinder giving out like with some budget chairs I’ve owned.
• Adjustable comfort – The 2D armrests, headrest, and lumbar support make it easy to find a setup that fits my posture. I’ve adjusted it differently for focused work versus when I just want to recline and relax.
• Breathable mesh back – The mesh design keeps airflow moving. This has been a big plus during summer months in the US, where air conditioning alone doesn’t always keep things cool.
• Meets standards – Knowing that the chair has BIFMA certification gives me more confidence in its durability and safety.

What Could Be Better

• Armrest limitation – The armrests only adjust up and down. Having more flexibility, like side-to-side or forward adjustments, would make it perfect for different desk setups.
• Lumbar support strength – The lumbar support can feel a bit too firm when fully extended. A softer or more gradual adjustment would improve comfort.
• Seat cushion longevity – The foam is comfortable now, but I wonder how well it will hold up after a few years of daily use.

Is the SIHOO M18 Good?

Yes—it’s a solid choice if you want an ergonomic chair without spending over $500. I’ve been using it daily, and it has handled long Zoom calls, editing sessions, and even the occasional gaming break without discomfort.

The adjustable headrest supports my neck when I recline, and the lumbar support keeps my back aligned. For me, the biggest difference compared to cheap office chairs has been not having to constantly shift to stay comfortable.

SIHOO M18 Overview

Feature	Details
Category	Ergonomic Office Chair
Brand	SIHOO
Seat Material	Memory foam cushion with fabric cover
Backrest	Breathable mesh, 3 recline angles
Armrests	2D adjustable (up and down)
Headrest	Adjustable height and tilt
Lumbar Support	Adjustable depth, up to 1.9 inches
Gas Lift & Base	BIFMA-certified piston with chrome legs
Tension Control	Adjustable recline tension knob
Weight Capacity	~330 lbs (150 kg)
Certification	BIFMA (safety + durability)

Recommendation

I’d recommend the SIHOO M18 to:

• Remote workers and students – If you’re sitting for long stretches, this chair helps with posture and comfort.
• Budget-conscious buyers – It’s not the cheapest chair, but it offers mid-range quality without jumping into Herman Miller prices.
• US office setups – The BIFMA certification matters in US workplaces, where safety and durability standards are important.

Who might want to look elsewhere? If you need 3D or 4D armrests, or if you prefer a very plush, memory-style cushion, then higher-end models like the SIHOO M90D might be better.

In short: The SIHOO M18 is a dependable, ergonomic office chair that makes long desk hours more comfortable. It may not have every premium feature, but it strikes the right balance for daily use.

To buy this product, Click here.

Details Comparison: sihoo m59as vs m18

I’ve used both the SIHOO M59AS and the SIHOO M18 for my daily work.
Each chair has strong points, and each has trade-offs.

Seat Comfort: sihoo m59as vs m18

Feature	SIHOO M59AS	SIHOO M18
Cushion feel	Firm, wide, supportive	Softer, more plush
Long hours	Can feel stiff after 6+ hours	Stays comfy for all-day use
Best for	Upright sitting, focus	Relaxed sitting, writing

My take: The M18 wins for comfort when I sit all day. The M59AS feels firm and structured, but less cozy over long hours.

• M59AS rating: 7/10
• M18 rating: 9/10

Backrest Support: sihoo m59as vs m18

Feature	SIHOO M59AS	SIHOO M18
Shape	Deep curve for spine	Mesh that flexes with body
Airflow	Limited	Strong airflow, stays cool
Support feel	Strong but rigid	Natural, adaptive

My take: On hot days, I loved the mesh of the M18. It let me lean back and still feel cool. The M59AS is solid but less forgiving.

• M59AS rating: 8/10
• M18 rating: 9/10

Adjustability: sihoo m59as vs m18

Feature	SIHOO M59AS	SIHOO M18
Armrests	More flexible, multi-angle	2D only (up/down)
Headrest	Higher range	Basic tilt and height
Recline	Wider recline	Limited but smooth

My take: The M59AS is great if you like tweaking settings often. The M18 was easier for me—set it once, then forget it.

• M59AS rating: 9/10
• M18 rating: 7/10

Build Quality: sihoo m59as vs m18

Feature	SIHOO M59AS	SIHOO M18
Frame	Heavier, premium feel	Lighter but stable
Base	Thick, strong	Chrome, decent strength
Durability	Built for long use	Good but not as tough

My take: Both lasted months without issues, but the M59AS gave me more trust in the frame and base.

• M59AS rating: 9/10
• M18 rating: 8/10

Design Look: sihoo m59as vs m18

Feature	SIHOO M59AS	SIHOO M18
Style	Sleek, modern	Simple, classic
Fit	Stands out in offices	Blends in with home setups
First impression	Premium	Minimalist

My take: The M59AS looked better in a modern office. But at home, the M18 fit in without drawing attention.

• M59AS rating: 9/10
• M18 rating: 8/10

Performance: sihoo m59as vs m18

Feature	SIHOO M59AS	SIHOO M18
Short tasks	Great with posture changes	Better for long sitting
Support	Strong, adjustable	Adaptive, comfy
Endurance	Best for active sitting	Best for deep focus

My take: Both are strong, but the M18 was my favorite for long writing sessions. The M59AS worked better for quick, active use.

• M59AS rating: 8/10
• M18 rating: 9/10

Ease of Use: sihoo m59as vs m18

Feature	SIHOO M59AS	SIHOO M18
Setup	Takes longer	Quick and simple
Adjustments	Many, needs fine-tuning	Few, straightforward
Daily use	Better for detail lovers	Better for simple use

My take: I found the M18 much easier day to day. The M59AS gave me more control, but it took time to adjust.

• M59AS rating: 7/10
• M18 rating: 9/10

Value for Money: sihoo m59as vs m18

Feature	SIHOO M59AS	SIHOO M18
Price	Higher, premium tier	Lower, mid-range
Features	Advanced adjustability	Simple but comfy
Worth it?	Yes, if features matter	Yes, if comfort matters

My take: For pure comfort, the M18 gave me better value. The M59AS is worth the extra only if you want full control and premium build.

• M59AS rating: 8/10
• M18 rating: 9/10

Overall: sihoo m59as vs m18

Chair	Strengths	Weaknesses	Best For	Overall Rating
M59AS	Premium build, high adjustability, modern look	Firm seat, higher price	Users who tweak posture often	8/10
M18	Plush seat, cool mesh, easy setup, good price	Less adjustability, lighter build	Long hours, budget users	9/10

Final thought: Both chairs are solid, but they serve different needs.
If you want control and premium feel, go for the M59AS.
If you want comfort and value, the M18 is the smarter buy.

FAQs for sihoo m59as vs m18

Which is more comfortable, the sihoo m59as vs m18?

The SIHOO M18 feels softer and cooler with its mesh back, great for long hours. The SIHOO M59AS is firmer and better for posture but less cozy.

Is the sihoo m59as better for adjustability than the m18?

Yes. The SIHOO M59AS has more armrest and recline options. The M18 is simpler, with basic adjustments that are quick to set and easy to use.

How does the price compare between sihoo m59as vs m18?

The SIHOO M59AS costs more due to its premium build and features. The SIHOO M18 is mid-range and offers strong comfort at a lower price.

Which chair lasts longer, sihoo m59as vs m18?

Both chairs are durable, but the SIHOO M59AS feels more solid with its heavy frame. The SIHOO M18 is lighter but still holds up well for daily use.

Who should choose the sihoo m59as vs m18?

Pick the SIHOO M59AS if you like full control and firm support. Go for the SIHOO M18 if you want comfort, easy use, and better value for money.