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Sihoo M18 Ergonomic Office Chair with Soft Cushion & Spine Support

4.8
Rated 4.8 out of 5 stars
2,888 Reviews
Sale price $169.99 Regular price $289.99
Color: Black

Benefits

  • Supports up to 330 lbs
  • Height-adjustable armrests for adaptable comfort
  • Dual-adjustable lumbar support for personalized lower back support
  • Soft, cushioned seat for cozy, long-lasting comfort
  • Breathable mesh backrest to keep you cool
  • Reclines up to 126° for comfortable relaxation
  • Certified by BIFMA for quality and durability
  • Endorsed by Creativebloq, TechRadar, GamingTrend, MMORPG, and more.

Promises

  • 30-Day Free Returns.: Try the chair for 30 days. If it’s not for you, feel free to return it.
  • 3-Year Warranty: Enjoy lasting comfort and peace of mind with our 3-year warranty.
  • Fast Shipping: Receive your chair in just 5-7 days, in US and CA.
  • Satisfaction Guarantee: For any issues, contact support_us@sihoo.com for prompt assistance and guaranteed satisfaction.

Payment methods

  • American Express
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  • Discover
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  • Visa

Your payment information is processed securely and the price includes regional tax.

How to choose a right ergonomic office chair?

Check out our buying guide for you!

Having reviewed and tested around 40 office chairs to date, I can confidently say that when it comes to style, comfort, ergonomics and value, there is no better than the Sihoo M18 chair.

Beren Neale

Beren Neale

from CREATIVE BLOQ, my favourite budget office chair

For me, Sihoo M18 just seemed to perfectly fit the contours of my body, allowing me to comfortably sit with full back and lumbar support, while providing options to adjust multiple aspects to suit the correct support and posture I needed to handle whatever task I was currently working on.

Richard Allen

Richard Allen

from GAMINGTREND, M18 ergonomic chair review

The biggest delight and surprise for me personally had to be the lumbar support. I’d already liked the more obvious adjustment via the knob to push that support in and out. With the new height I chose, my attempts at maintaining my posture are literally better-supported.

Victoria Rose

Victoria Rose

from MMORPG, m18 classic office chair review

1 of 3

"Enhance your posture, relieve your stress—sit well and think better."

Sihoo M18
  • W-shape cushion

    W-shape cushion

  • Breathable mesh backrest

    Breathable mesh backrest

  • Dual-adjustable lumber support

    Dual-adjustable lumber support

  • 3D adjustable armrests

    2D Adjustable armrests

How M18 Chair Helps?

  • Soft and Cozy Seating

    Soft and Cozy Seating

    The Sihoo M18’s W-shaped sponge cushion offers ultra-soft comfort for all-day sitting.

  • Stay cool and refreshed

    Stay cool and refreshed

    The breathable mesh back keeps air flowing, preventing sweat and stickiness, so you stay cool and comfy.

  • Custom lumbar support

    Custom lumbar support

    Adjust the lumbar support vertically and horizontally for perfect lower back comfort in any position.

  • Relaxed Arm Support

    Relaxed Arm Support

    Adjust the armrests up or down to keep your arms relaxed and comfortable while you work.

Specifications

  • Overview

    Sihoo M18 ergonomic chair offers essential features designed for lasting comfort and support, making it an ideal choice for both work and relaxation.

    Name: Sihoo M18 Ergonomic Chair

    General Dimensions: 28"W x 27"D x 44"-51"H

    Product Weight:37.1 lbs

    Assembly: Requires assembly

    Materials:

    • Polyester mesh fabric
    • Steel, aluminum & nylon framing parts
    • Polypropylene back/headrest framing
    • Cushion chair padding

    Maximum load: 330 lbs

    Warranty: (3) years warranty

  • Sihoo M18 Specifications

    Chair back lifting height: 44.09" - 51.18"

    Seat depth: 17.91"

    Max hip width: 20.08"

    Maximum load: 330 lbs

    Armrests: Adjustable armrests (Up and down)

Sihoo M18 Office Chair

@sihoo_usa

For every part of you

4.8
Rated 4.8 out of 5 stars
Based on 2,888 reviews
Total 5 star reviews: 2.5k Total 4 star reviews: 430 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 1
100%would recommend this product
Slide 1 selected
2,888 reviews
  • C
    Christopher
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    December 13, 2025
    5 Stars

    I am globally satisfied because assembly was a breeze. The M18 ergonomic chair offers a clean and comfortable design without any unnecessary fuss and it is a great addition to my workspace.

  • M
    Marine
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    December 5, 2025
    5 Stars

    Easy to assemble even on your own. The adjustable lumbar support and armrests are perfect for finding the right posture.

  • MH
    mike h.
    I recommend this product
    Rated 5 out of 5 stars
    October 13, 2025
    So good I bought it a second time

    As an IT analyst working remotely from home, I've put roughly 10 hrs. a day in this chair since I first purchased it 2021. And despite the heavy use I've never had any issues with soreness or body aches. For reference I am male and 175lbs. Overall the chair has held up great, from the fabric to the construction it still looks like it did when I purchased it. But after 4 years the seat cushion had finally begun to lose its supportiveness.While shopping for a new chair I knew I wanted the same features that I liked about my old chair: comfy but supportive foam seat, mesh back for cooling, adjustable armrests, headrest, and lumbar support and finally a simple and clean styling (for those Teams calls). The more I looked at comparable chairs the more I realized what a great value this chair has been and decided why gamble with another brand when I knew how good this chair was. Just bought a second SIHOO M18 and happy to say the new chair is just as comfortable as the old one.If you are looking for an ergonomic office chair with excellent comfort, support, adjustability and styling in the sub $200 range the SIHOO M18 is a great choice.

  • L
    Lena
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    September 26, 2025
    5 Stars

    The soft mesh seat is more comfortable than my previous leather chairs.

  • F
    FRANCISCO
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    September 25, 2025
    5 Stars

    I tried it at a friends house and immediately wanted the link to buy my own.