Sihoo M90D Review: Ultimate Comfort for Long Hours

Last Updated on October 27, 2025 by Cassie Moorhead

SIHOO M90D Review

If you’re spending long hours at your desk, the Sihoo M90D ergonomic office chair might be one of the best upgrades you can make. It blends comfort, adjustability, and solid build quality in a way that feels premium without the premium price tag. After testing it for weeks, I can confidently say — this chair fixed everything I disliked about the previous M57 and made my daily work sessions much easier. If you’ve been searching for a dependable ergonomic chair that actually supports your posture, keep reading — this might just be it.

What I Like

• Exceptional Comfort for Long Hours
  I sit at my desk for about eight hours a day, and the Sihoo M90D makes that time feel effortless. The seat cushion is firm yet soft enough to avoid fatigue, which I didn’t expect at this price point.
• Dynamic Lumbar Support That Actually Works
  The elastic lumbar support adjusts naturally with your back movement. I didn’t have to constantly reposition myself — it adapts automatically to your posture, which helps with lower back comfort.
• Breathable Mesh and Solid Build Quality
  The backrest’s PE + polyester mesh design keeps things cool even on warm days. For anyone in the U.S. who works without constant AC, that breathable support really matters.
• Quiet and Smooth Adjustments
  One thing that annoyed me about my old chair was the squeaky noise during Zoom calls. The M90D is completely silent, and its aluminum alloy base and gas lift feel sturdy and well-balanced.
• Great Adjustability
  From the 3D PU armrests to the height-adjustable backrest (up to 6 cm), it’s easy to find your perfect position. The double-jointed headrest adds extra neck comfort that taller users like me appreciate.
• Value for Money
  At around $239.99, the Sihoo M90D punches way above its price. It’s BIFMA and SGS certified, which means it meets international durability and safety standards — something that gives me confidence it’ll last for years.

In short: the Sihoo M90D combines all the ergonomic essentials — comfort, adjustability, and support — into a budget-friendly package that performs like a premium chair.

What Could Be Better

• Seat Cushion May Feel Firm for Some
  While I personally like the firmer support, some users might prefer a softer feel, especially if they’re used to plush gaming chairs.
• Limited Color Options
  It’s mostly available in grey, which is clean and modern but might not match every office aesthetic. A few more color choices would make it perfect.
• Headrest Adjustment Range
  The headrest is great, but if you’re under 5’6″, you might find it slightly high even on the lowest setting. A bit more flexibility could make it more inclusive for all users.

In short: while the Sihoo M90D nails the essentials, a bit more softness, color variety, and minor headrest tweaking could make it flawless.

My Personal Experience with the SIHOO M90D

After switching from my old chair to the Sihoo M90D, I instantly noticed the difference. The setup took about 20 minutes, and everything fit together smoothly without tools beyond what was included.

Here’s what stood out to me:

• I no longer end my day with back pain or shoulder stiffness.
• The dynamic lumbar support feels like it “hugs” your lower back.
• Even after 9 hours, there’s no soreness on my thighs or hips.
• The recline lock is super handy for short breaks between tasks.
• The armrests fit perfectly under my desk, and they don’t wobble.
• It doesn’t creak — a blessing during long video calls.
• The mesh back kept me cool, even when working without the fan on.
• The build feels premium — solid frame, smooth tilt, balanced base.
• I appreciate that it’s certified by BIFMA and SGS, giving a professional feel.
• For the price, I honestly think this chair competes with models twice as expensive.

In short: my experience has been excellent — the M90D brought real comfort and focus back to my workspace.

Comparing with Other Brand

I’ve also used the Autonomous ErgoChair Pro, which was good but came with a few annoying squeaks and a higher price tag. The Sihoo M90D, on the other hand, surprised me with its smoother build, more flexible back support, and better adjustability — all at a lower cost.

Sihoo M90D vs Autonomous ErgoChair Pro: Quick Comparison

Feature	Sihoo M90D	Autonomous ErgoChair Pro
Price	$239.99	Around $499
Lumbar Support	Dynamic elastic support	Fixed adjustable support
Backrest	Breathable PE + Polyester Mesh	Full mesh back
Seat Comfort	Firm and supportive	Softer but less structured
Noise Level	Completely silent	Slight creaks over time
Adjustability	3D Armrests + 6 cm back height	3D Armrests only
Build Quality	BIFMA + SGS certified	BIFMA certified
Headrest	Double-jointed, flexible	Single-joint, limited motion
Best For	Long work hours, tall users	Medium build users, mid-price ergonomics

Summary: The Sihoo M90D delivers comparable — even better — ergonomic support at nearly half the price, making it the smarter pick for most U.S. home office setups.

Recommendation

If you’re someone who works long hours at a desk — whether from home or in an office — the Sihoo M90D is absolutely worth considering. It’s ideal for:

• Remote professionals who value comfort and back health.
• Tall users who need a bit more head and legroom.
• U.S. users seeking an ergonomic chair that balances comfort and affordability.

However, if you prefer ultra-soft seats or want more design color options, you might explore other models.

From my experience, the Sihoo M90D is a fantastic middle ground — durable, quiet, supportive, and designed with real human comfort in mind. It’s proof that you don’t have to spend over $500 to get a chair that truly supports your workday.

FAQs for the Sihoo M90D

Q1: Is the Sihoo M90D comfortable for long hours of work?
Yes, the Sihoo M90D offers firm cushioning and dynamic lumbar support, making it comfortable for 8+ hours of daily use.

Q2: Can the backrest and armrests be adjusted?
Absolutely. The Sihoo M90D has a height-adjustable backrest and 3D PU armrests that move in multiple directions for a perfect fit.

Q3: Does the Sihoo M90D support tall users?
Yes, its taller backrest and extendable armrests make it suitable for users up to around 6’2″, reducing leg and shoulder strain.

Q4: Is the Sihoo M90D mesh breathable and suitable for hot climates?
The chair features a PE + polyester mesh back that keeps you cool while working, making it ideal for warm home or office setups.

Q5: How does the Sihoo M90D compare to other ergonomic chairs?
It offers premium comfort, quiet operation, and certified durability at a lower price than many high-end chairs like Autonomous or Herman Miller models.

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