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M18 Classic Office Chair With Triple Spinal Relief

4.8
Rated 4.8 out of 5 stars
1,729 Reviews
$149.99 $199.99
Color: Blue
Version

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
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Venmo
  • 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

    3D 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: 3D coordinated armrests (Up and down, left, right, forward and backward)

Sihoo M18 Office Chair

@sihoo_usa

For every part of you

4.8
Rated 4.8 out of 5 stars
Based on 1,729 reviews
Total 5 star reviews: 1.4k Total 4 star reviews: 289 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 1
100%would recommend this product
Slide 1 selected
1,729 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!!

  • AV
    Abhijit V.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    March 24, 2025
    5 Stars

    The Sihoo chair is thoughtfully designed with attention to detail and comfort. What truly stood out, however, was the exceptional customer service experience. The team was incredibly responsive, courteous, and genuinely committed to providing a great solution. It's clear they prioritize customer satisfaction and continuous improvement. I truly appreciate their dedication and would be happy to consider Sihoo again in the future!

  • F
    Frisbie
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    March 19, 2025
    5 Stars

    As someone who weighs 250 pounds and spends 8+ hours daily at a desk, this SIHOO M18 chair has been transformative for my comfort and posture. The adjustable lumbar support is the standout feature - it perfectly fills the curve of my lower back, eliminating the pain I experienced with previous chairs.Assembly was straightforward, taking about 30 minutes with clear instructions. The build quality is impressive with a sturdy frame that easily supports my weight without creaking or wobbling, even after months of daily use.The adjustability options are comprehensive - the headrest height and angle, armrest position, seat height, and tilt tension can all be customized for perfect ergonomics. The breathable mesh backrest keeps me cool even during summer months.The PU wheels roll smoothly and quietly on both carpet and hardwood without marking floors or collapsing under my weight. The seat cushion maintains its shape without flattening, which has been an issue with other chairs I've tried.For larger people seeking proper support, this chair delivers exceptional value compared to premium brands costing twice as much. My productivity has improved simply because I'm no longer constantly shifting to find comfort.

  • J
    jjcorb
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    March 16, 2025
    5 Stars

    Great chair for all day work. At 6'1 195 lbs the seat, back, headrest are comfortable with room to spare. Plenty of adjustments and the reclining feature is a nice addition. I needed to drive one screw into the headrest adjustment to keep it at it's highest point but that is fine. Would really like better wheels since pushing back from my desk nearly has me pushing the desk away.

  • A
    A.Luna
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    March 2, 2025
    5 Stars

    I give this business and chair 5 stars. I bought it for my son and we did have issues with the seat. I did contact Sihoo customer service and provided a video. They quickly replaced the chair. The material of the chair is very good and looks very elegant. The look was the main reason for picking it. It is easy to put together and is firm. The only issue was the screws on the first chair would not stay in. But it was quickly resolved.