Sihoo M18 Ergonomic Office Chair with Adjustable Headrest

Fast Shipping Within 7 Days | 3 Years Warranty

M18 Classic Office Chair With Triple Spinal Relief

4.8
Rated 4.8 out of 5 stars
2,583 Reviews
Sale price $149.99 Regular price $159.99
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 Worry-Free Trial: 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@sihoooffice.com for prompt assistance and guaranteed satisfaction.

Payment methods

  • American Express
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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 2,583 reviews
Total 5 star reviews: 2.2k 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
2,583 reviews
  • P
    Ptexx
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 11, 2025
    5 Stars

    I have had this chair for 3 years now and can say that it has held up extremely well. I am work from home 3 days a week and I vary between sit and stand. I have not noticed any change in the seat padding or anywhere else for that matter. Its holding up vey well. As for comfort. There are plenty of adjustments to customize to a variety of body types. I would say this chair is as good as the $$$$$ chair at my office for a fraction of the price. I did have one small/minor issue that Sihoo addressed immediately. I would buy again!!

  • W
    Wbfc29
    Verified Buyer
    I recommend this product
    Rated 4 out of 5 stars
    April 10, 2025
    4 Stars

    Just finished assembling it and my first impression is very positive. Packaging was secure, instructions were clear, and quality of included tools impressed me. The lumbar support fits perfectly low on the back, which is great. No creaks, smooth adjustments, and the wheels roll easily. The fabric has no flaws. If it lasts, it is an excellent value.

  • AM
    Ana M. G.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 6, 2025
    5 Stars

    It was easy to assemble; it comes with a small manual. Instructions are in Spanish, and it turned out perfect. When testing it, it feels comfortable and strong. The parts feel high quality. I will start using it and leave another comment after some days of use to see how my back and neck feel. Initially, I am very satisfied.

  • DG
    Debbie G.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 6, 2025
    5 Stars

    Very comfortable. After a long day of sitting, your body feels less tense and does not ache with this office chair. Excellent price compared to others and this chair gives much more comfort and stability than previous chairs used.

  • J
    Jirong
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 4, 2025
    5 Stars

    I love this office chair, comfortable and affordable. The style is what I love the most, adjustable headrests and armrests are a plus. Adjustable height, very thick armrest cushions make it very comfortable to rest my arms while working for long hours. The seat is wide enough where I can sit on it for long periods of time. And when I am tired I can just rest my head and can easily fall asleep. I definitely recommend this chair to friends and might buy one more for my other room.