Sihoo V1 vs M18: A Real User’s Calm Verdict

Last Updated on November 2, 2025 by Cassie Moorhead

Choosing between the Sihoo V1 vs M18 is tougher than it seems. Both look sleek and promise great back support, but they feel quite different once you actually sit down. I’ve used both for months while working from home — switching between long writing sessions, meetings, and breaks. Here’s everything I learned, shared simply and honestly.

Sihoo V1 Review

The Sihoo V1 is one of the most comfortable chairs I’ve used. It keeps my back straight and my body relaxed through long work hours. The 4D lumbar support follows my spine, so I don’t feel sore after sitting. It feels solid, breathable, and easy to adjust. If you want a chair that truly supports healthy sitting, the V1 does the job well.

What I Like

• Strong back support: The Y-shaped frame fits my spine and helps me stay upright.
• Easy to adjust: The headrest moves smoothly, and the recline feels natural.
• Quality build: The aluminum alloy base looks clean and feels steady.
• Safe and tested: BIFMA and SGS certifications prove its strength and safety.

What Could Be Better

• Setup: The guide could be clearer. A few parts took me a moment to figure out.
• Armrests: They move well but feel a bit loose when I lean hard.
• Price: It costs more than entry-level chairs, though the comfort justifies it.

Sihoo V1 Overview

Feature	Detail
Brand	SIHOO
Type	High-back ergonomic chair
Frame	Y-shape with S-curve support
Lumbar Support	4D adjustable
Headrest	Height + angle adjustable
Material	Mesh back, aluminum base
Certifications	BIFMA & SGS
Recline	Up to 125° with tilt lock
Weight Limit	330 lbs
Warranty	3 years (U.S.)

Recommendation

The Sihoo V1 is perfect for remote workers, designers, or anyone who sits long hours. It gives firm support without feeling stiff. I’d suggest it if you care about posture and want lasting comfort. If your budget is tight, the M18 offers good value. But for the best control and build, the V1 is worth it.

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Sihoo M18 Review

The Sihoo M18 feels light, cool, and steady. I’ve used it for long days of writing, and my back stays relaxed. The lumbar support and memory-foam seat help me sit longer with less strain. It’s simple to adjust and fits well in small home offices. For daily comfort at a fair price, the M18 is a strong choice.

What I Like

• Back comfort: The lumbar support hits the lower spine just right.
• Breathable mesh: Air flows well, even in warm rooms.
• Smooth adjustability: The 2D armrests move easily and stay firm.
• Seat comfort: The memory foam stays soft but never sags.
• Reliable build: It passed a 1136 kg static pressure test and meets BIFMA standards.

What Could Be Better

• Armrest range: The 2D arms move up and down but not side to side.
• Tilt: The recline is smooth but could go a bit farther.
• Size of box: Shipping box is bulky; carrying it upstairs was tough.

Sihoo M18 Overview

Feature	Detail
Brand	SIHOO
Type	Ergonomic office chair
Back Material	Breathable mesh
Seat Cushion	Memory foam
Armrests	2D adjustable
Headrest	Adjustable for neck support
Lumbar Support	Built-in ergonomic design
Tilt Range	Up to 120°
Certifications	BIFMA + 1136 kg static test
Weight Limit	330 lbs
Warranty	3 years (U.S.)

Recommendation

The Sihoo M18 suits students, freelancers, and office workers who need steady support at a lower cost. It keeps you cool and comfortable all day. If you live in a warm U.S. state, the mesh back is a big plus. Choose the V1 for more adjustments, but the M18 offers excellent everyday value.

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Details Comparison – Sihoo V1 vs M18

Before diving deep, here’s a quick side-by-side overview based on my personal experience.

Feature	Sihoo V1	Sihoo M18
Design Type	Premium ergonomic with Y-back	Classic ergonomic with fixed support
Lumbar Support	4D adjustable	Fixed, soft support
Headrest	Adjustable height + tilt	Height only
Armrests	4D flexible	2D adjustable
Seat Cushion	Firm, long-use support	Soft, memory-foam comfort
Mesh Material	Dense, premium mesh	Light, breathable mesh
Base Material	Aluminum alloy	Metal base
Weight Capacity	330 lbs	330 lbs
Price Range (USA)	Around $450	Around $310
Best For	Long work sessions	Light to medium office use

Now, let’s go deeper into each area — I’ll share what stood out, what fell short, and how each one performed in real daily use.

Ergonomic Design: Sihoo V1 vs M18

The Sihoo V1 feels like it hugs your spine. Its Y-shaped backrest and adjustable lumbar pad keep my posture upright even after hours. The M18 has a softer feel, which works well for short tasks but doesn’t give the same structured support.

➡️ My take: I felt less fatigue and shoulder pressure in the V1 after long days.
Rating: V1 – 9/10 | M18 – 8/10

Headrest and Armrest Adjustability: Sihoo V1 vs M18

If you like fine-tuning your setup, the V1 wins easily. The 4D armrests move every way you want, and the headrest adjusts to fit your height and neck angle. The M18 keeps things simpler, with just basic up-down movement.

➡️ My take: During long design or writing sessions, V1’s flexibility saved my neck.
Rating: V1 – 9/10 | M18 – 7.5/10

Seat Comfort and Cushion Support: Sihoo V1 vs M18

At first, the M18’s seat feels softer and more inviting. But over time, the V1’s firmer cushion stays supportive and keeps your hips aligned.

➡️ My take: M18 feels cozier short-term, but V1 holds up better through long workdays.
Rating: V1 – 8.5/10 | M18 – 8/10

Material and Breathability: Sihoo V1 vs M18

Both chairs use mesh that keeps airflow strong, which is great for warm U.S. climates. The V1’s mesh feels thicker and premium, while the M18 uses lighter material that stays cooler.

➡️ My take: I liked M18’s cooling feel in summer, but V1 feels built to last longer.
Rating: V1 – 8.5/10 | M18 – 9/10

Build Quality and Stability: Sihoo V1 vs M18

The Sihoo V1’s aluminum base gives a strong, premium feel with no wobble. The M18 feels solid too but not quite as heavy-duty. Both passed the BIFMA safety test.

➡️ My take: V1 feels like a long-term investment; M18 is ideal for lighter daily use.
Rating: V1 – 9/10 | M18 – 8/10

Performance: Sihoo V1 vs M18

When it comes to performance, the V1 stands out during 6+ hour workdays. It keeps posture steady and feels reliable. The M18 performs well for shorter tasks or casual use but lacks deep adjustability.

➡️ Summary: V1 suits dedicated professionals; M18 fits budget-conscious users.
Rating: V1 – 9/10 | M18 – 8/10

Ease of Use: Sihoo V1 vs M18

Both are simple to assemble. The M18 has fewer knobs and levers, so it’s easier for beginners. The V1 takes a few minutes to adjust, but once dialed in, it feels more personal.

➡️ Summary: M18 is easy out of the box; V1 needs setup but rewards effort.
Rating: V1 – 8.5/10 | M18 – 9/10

Value for Money: Sihoo V1 vs M18

In the U.S., the V1 costs about $140 more, but you’re paying for better ergonomics and longer durability. The M18 gives excellent comfort for its price.

➡️ Summary: V1 is worth it if you sit all day; M18 shines for casual workspaces.
Rating: V1 – 8.5/10 | M18 – 9/10

Overall: Sihoo V1 vs M18

Both chairs deliver strong value in their own way. If you want a premium, posture-friendly chair, the Sihoo V1 is the better long-term choice. But if you’re on a budget and need comfort for short to medium hours, the Sihoo M18 is a fantastic pick.

➡️ Summary: V1 = Professional comfort. M18 = Affordable daily ease.
Rating: V1 – 9/10 | M18 – 8.5/10

Final Verdict: Sihoo V1 vs M18

If I had to choose one for full-time remote work, I’d pick the Sihoo V1 — it supports my back better and feels built for the long run. But if you’re upgrading from a basic chair or don’t sit more than 5 hours daily, the M18 gives you 80% of the comfort for much less. Visit Now Best Home Office Chair under $250 for Comfort and Durability.

FAQs for Sihoo V1 vs M18

Which chair is more comfortable, Sihoo V1 or M18?

The Sihoo V1 feels firmer and supports your back better during long hours. The M18 is softer and ideal for short to medium sitting sessions.

Does the Sihoo V1 have better adjustability than the M18?

Yes. The Sihoo V1 has 4D armrests, an adjustable headrest, and lumbar support. The M18 offers simpler adjustments suited for casual office use.

Is the Sihoo M18 worth buying in 2025?

Absolutely. The Sihoo M18 still delivers great comfort and value for its price. It’s one of the best budget ergonomic chairs for home offices.

Which is better for tall users, Sihoo V1 or M18?

The Sihoo V1 fits tall users better thanks to its longer backrest and adjustable headrest. The M18 works best for average to medium height users.

What’s the main difference between Sihoo V1 and M18?

The Sihoo V1 offers more customization and premium build quality. The M18 focuses on comfort and simplicity at a lower cost. Both are solid ergonomic options.