New Arrival → C300 Pro V2

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

4.8
Rated 4.8 out of 5 stars
199 Reviews
Sale price $349.99 Regular price $789.99
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Color: Black
Version

Benefits

  • Supports up to 330 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.
  • Free 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: 330 lbs

    Warranty: (3) years warranty

  • Chair back lifting height: 44.72" - 50.91"

    Seat depth: 16.81"-17.76"

    Max hip width: 20.28"

    Maximum load: 330 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 199 reviews
Total 5 star reviews: 174 Total 4 star reviews: 22 Total 3 star reviews: 2 Total 2 star reviews: 0 Total 1 star reviews: 1
98%would recommend this product
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199 reviews
  • MA
    Mohammed A. H.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    May 4, 2026
    5 Stars

    The dynamic lumbar support is the standout feature for me. Most chairs lose support when you recline, but the C300 Pro keeps contact with my lower back the whole time. I also really like the headrest adjustment because it actually supports my neck properly when leaning back during breaks.

  • VD
    Vadim D.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 30, 2026
    5 Stars

    I upgraded from the regular C300 and the Pro version definitely feels more refined. The armrests move more naturally, the back support feels smoother, and the recline mechanism is noticeably better. The chair encourages good posture without feeling overly stiff or aggressive. It also looks very clean in my office setup.

  • IS
    I S.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 20, 2026
    5 Stars

    The C300 Pro is a very good ergonomic chair overall. I especially like the breathable mesh and flexible back support. The lumbar system feels more active than traditional office chairs, so it took me a few days to get used to the sensation, but after adjusting the settings properly it became very comfortable. Assembly was straightforward and the chair feels sturdy once completed.

  • MS
    Mirko S.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 17, 2026
    5 Stars

    I was originally looking at much more expensive ergonomic chairs, but decided to try the C300 Pro after reading reviews. Honestly impressed. The mesh feels premium, the backrest adapts well as you move, and the seat stays comfortable even after long workdays. Assembly took about 45 minutes alone and everything fit together cleanly.

  • GM
    Gillian M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 7, 2026
    5 Stars

    The C300 Pro feels like a huge upgrade from my previous office chair. The lumbar support moves naturally with my posture instead of feeling fixed in one position, and the coordinated armrests are surprisingly useful during long typing sessions. I spend around 9 hours a day working from home, and this chair has noticeably reduced lower back fatigue for me.