C300 Pro in Black is in stock! Check out now!

30-Day Free Returns & 3-Year Warranty

Sihoo C300 Pro Ergonomic Office Chair with Seat Depth for Long Sitting

4.8
Rated 4.8 out of 5 stars
88 Reviews
Sale price $379.99 Regular price $429.99

Color: Black
Version

C300 Pro is restocked!

Benefits

  • Supports up to 300 lbs
  • Dynamic lumbar support for all-day back comfort
  • Designed to fit users from 5' to 6'3"
  • Spacious cushion with adjustable seat depth
  • 6D adjustable armrests for versatile support
  • Easy adjustments with a single handle
  • Certified by BIFMA and SGS for quality and durability
  • Endorsed by The Gadgeteer, MMORPG, and loved by thousands of workers for ergonomic excellence

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

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How to choose a right ergonomic office chair?

Check out our buying guide for you!

"Relax and let inspiration flow—sit well and think better."

sihoo doro c300 pro ergonomic office chair

I took the C300 Pro to work, where I sit for eight hours a day. It is way more comfortable than my basic office chair, and its high-tech look gets plenty of attention from everyone else in the office.

12 PR sihoo

Mitch Gassner

from mmorpg, Doro C300 Pro Ergonomic Chair Review

Adjustable seat depth for custom comfort

Adjustable seat depth for custom comfort

Doro C300 Pro’s expanded seat cushion provides a more spacious seating area for larger individuals, enhancing comfort. The adjustable seat depth allows for personalized positioning to suit your needs.

Adjustable anti-spine lumbar support

Adjustable anti-spine lumbar support

The BM (Body Movement) Tracking System ensures the lumbar support automatically conforms to your spine to keep your back comfortable and supported during different postures without the need for manual adjustment.

The mesh fabric provides plenty of support without all of the sweatiness of a leather gaming chair. All of the adjustability options of the C300 Pro allow you to comfortably sit for hours on end while you game away.

12 PR sihoo

Mitch Gassner

from mmorpg, Doro C300 Pro Ergonomic Chair Review

How C300 Pro Chair Helps?

  • Flexible seat back that contours to your back

    Flexible seat back that contours to your back

    When you move your upper body around or reach down to the side to pick up a pen you drop, the streamlined backrest with triangular frame flexes and matches your back, providing continuous support.

  • Full-back comfort for any size

    Full-back comfort for any size

    Easily adjust the headrest up and down, back and forth, or rotate it to fit the curve of your neck, giving you the perfect support and comfort. The wide surface also offers enough space to rest your head comfortably on the side.

  • Designed to elevateyour workspace

    Designed to elevateyour workspace

    Doro C300 Pro features a sleek, modern design inspired by ergonomic human spine. It’s comfortable to sit on and looks great, making it a perfect fit for your office, study, or home.

Specifications

  • Overview

    Designed to enhance your comfort, Sihoo Doro C300 Pro features automatic lumbar support and a spacious seat cushion for all-day ease. Enjoy flexible armrests and a customizable headrest that adapt to your every position, all wrapped in a sleek, modern design.

    Name: Doro C300 Pro Ergonomic Chair

    General Dimensions: 28"W x 28"D x 45"-51"H

    Product Weight: 55.34 lbs

    Assembly: Requires assembly

    Materials: ‎Mesh back and seat with soft PU coated armrests

    Maximum load: 300 lbs

    Warranty: (3) years warranty

  • sihoo doro c300 pro Specifications

    Chair back lifting height: 44.72" - 50.91"

    Seat depth: 16.81"-17.76"

    Max hip width: 20.28"

    Maximum load: 300 lbs

    Armrests: 6D coordinated armrests (up and down, left and right, front and back, inward and outward, with tilt-lock of armrests, and synchronized recline)

Doro C300 Pro Ergonomic Office Chair

@sihoo_usa

For every part of you

4.8
Rated 4.8 out of 5 stars
Based on 88 reviews
Total 5 star reviews: 67 Total 4 star reviews: 20 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
99%would recommend this product
Slide 1 selected
88 reviews
  • H
    Hanzo
    I recommend this product
    Rated 5 out of 5 stars
    October 20, 2025
    incredibly comfortable

    The office chair feels incredibly comfortable with its ultra-soft armrests and dynamic lumbar support. After using it for long hours, I noticed a significant reduction in back pain, which was a game-changer for me. The chair's design is sleek and easy to put together, and it's holding up really well over time. I love how adjustable it is, especially the 2-way headrest and the height settings, making it super customizable to my needs. Overall, it’s definitely a great value for the price!

  • KC
    Kevin C.
    I recommend this product
    Rated 5 out of 5 stars
    October 18, 2025
    Durable and high quality office chair

    Excellent quality and durable, even for larger people. I like the lumbar support that you can adjust at the back. The packaging is very heavy, and the chair is too, which makes it a bit difficult to roll/move around. Overall, however, this is a great office chair for the price point.

  • C
    Cus
    I recommend this product
    Rated 5 out of 5 stars
    October 17, 2025
    Great office chair

    Building it fairly easy. the chair itself is fine. i like mesh type chair. the wheel is ok. the lumber is nice. never thought i would need this, but really help with the back.

  • M
    MrsPebbles
    I recommend this product
    Rated 5 out of 5 stars
    October 16, 2025
    Nice quality chair with fantastic lumbar support, but wish the back were a bit more forward

    I assembled this chair over two days so I'm not sure how long it took, but I think at least a couple hours total. I had difficulty attaching the arms and lining screws up with holes. And I don't mean the machining was off. That was fine. I just needed to loosen a few screws and then assemble in a different order or something. (Can't quite remember, sorry!) Anyway, the chair is very nice. A couple coworkers have tried it as well and we all appreciate the lumbar support, but find the fact that the arms don't lock into place somewhat annoying. I'm fairly used to it now. I now realize that I prefer a cushioned seat, but this one's not bad. I've been plenty comfortable in this chair, no complaints. I very much appreciate the somewhat aggressive lumbar support (which can be adjusted up and down for different body types)--it's exactly what I had hoped for. Just one issue: I personally wish the back could sit slightly more forward. I feel my posture needs to be almost forced into an upright position. My coworkers feel it's upright enough for them, and I think I'm adjusting. The headrest also adjusts, and I thought it might just be an annoyance, but it turns out I like it!

  • N
    Netroamer
    I recommend this product
    Rated 5 out of 5 stars
    October 14, 2025
    Great ofice chair.

    The office chair is comfortable and ajustable. I like that the chair contins no wood therefore I belive it will be more durable and last longer. I bought one for my office and was so happy with it I had to buy another one.