30-Day Free Returns | 3-Year Warranty | Free Shipping

Sihoo C300 Ergonomic Office Chair with Advanced Back Support

4.9
Rated 4.9 out of 5 stars
878 Reviews
Sale price $269.99 Regular price $559.99

Color: Black
Version

Benefits

  • Supports up to 330 lbs
  • Environmentally certified by BIFMA and TUV for quality and safety
  • 4D adjustable armrests and multi-adjustable headrest for maximum comfort
  • Flexible backrest and self-adaptive lumbar support for consistent waist support
  • Streamlined seatback and waterfall-shaped seat for a lighter, ergonomic experience
  • Smart weight-sensing mechanism for effortless, balanced reclining
  • Endorsed by Tom's Guide, CNET, CNN, TechRadar, Forbes, and more than 1,000 reviews

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
  • 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!

The lumbar support automatically adjusts as you lean back, which I found helpful, and the wheelbase is solid metal, not nylon, so there is less chance of it coming loose over time.

James Bricknell

James Bricknell

from CNET, best chairs of 2024

The netting material makes the chair comfortable on hot days, durable, and able to withstand extended use. And the upshot is a light and relatively compact seat, making it ideal for home office use.

Mark Sparrow

Mark Sparrow

from Forbes, affordable ergonomic chairs

The seat pan of the Doro C300 has a waterfall-shaped seat, which is designed to “offer a weightless seating experience”, closely resembles the one found on the much more expensive chair.

Anthony Spadafora

Anthony Spadafora

from Tom's Guide, C300 ergonomic chair review

1 of 3

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

Sihoo Doro C300 Ergonomic Office Chair

How C300 Chair Helps?

  • sihoo doro c300 Ergonomic Design

    Ergonomic Design

    Design inspired by natural lines of human body, whether you prefer leaning forward or reclining while you work—it adapts effortlessly to your needs.

  • doro c300 Ergonomic Support

    Ergonomic Support

    The adjustable parts provides great support, and the eco-friendly, high-tech lightweight mesh keeps you cool and comfortable. It’s designed to fit your body naturally for all-day comfort.

    *Adjustable backrest fits all body types!

  • doro c300 Ergonomic Tech

    Ergonomic Tech

    Breathable waterfall cushion design reduces pressure on your thighs and hips, while the high-tech mechanism provides strong support for leaning back, ensuring you can sit comfortably all day long.

Specifications

  • Overview

    Doro C300 guarantees that the lumbar support adjusts itself to the contours of your spine, ensuring both comfort and support for your back in various positions, all without requiring any manual adjustments.

    Name: Doro-C300 Ergonomic Chair

    General Dimensions: 28"W x 28"D x 42"-49"H

    Product Weight: 65.58 lbs

    Assembly: Requires assembly

    Materials: Mesh back and seat, soft PU coated armrests

    Maximum load: 330 lbs

    Warranty: (3) years warranty

  • Chair back lifting height: 18.11" - 21.65"

    Seat depth: 17.13" - 18.11"

    Max hip width: 20.28"

    Maximum load: 330 lbs

    Armrests: 4D coordinated armrests (Up and down, left, right, forward and backward, tilt linkage)

Sihoo Doro C300 Office Chair

@sihoo_usa

For every part of you

4.9
Rated 4.9 out of 5 stars
Based on 878 reviews
Total 5 star reviews: 806 Total 4 star reviews: 67 Total 3 star reviews: 1 Total 2 star reviews: 1 Total 1 star reviews: 3
99%would recommend this product
Slide 1 selected
878 reviews
  • S
    sanchez
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    February 22, 2026
    5 Stars

    Product is great sits really good, would recommend and another for future purchases.

  • A
    A
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    February 20, 2026
    5 Stars

    Myself and my husband both work from home, so we go through a lot of office chairs between us. I work about 9 hours a day and sit for most of that time, so at this point I have a pretty good sense of what works and what does not in the office chair world. I usually prefer heavily padded executive chairs because comfort matters to me, but those often come with a serious price tag. So most of the time I end up using more practical ergonomic styles instead.

    This C300 is surprisingly comfortable considering there is no thick padding. The lumbar support is excellent for posture, but what really impressed me is something I did not even see mentioned clearly in the product description. I like to relax, curl up a little, and constantly shift positions throughout the day. With many ergonomic chairs that can feel restrictive. With this one, the back structure actually provides a stable yet slightly flexible support that adapts to different sitting positions.

    The back frame seems to offer a secure and supportive foundation while still allowing a bit of movement and wraparound support. That balance makes it feel both stable and forgiving when I fidget. I genuinely like this part of the design and think they should highlight it more. If I had known earlier that the C300 offered this kind of steady yet adaptable support for different sitting habits, I probably would have bought it sooner.

    It arrives unassembled, but putting it together was no more difficult than any other chair we have…

  • CZ
    Carl Z.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    February 19, 2026
    5 Stars

    The most comfortable and high-quality office chair I bought. Especially, I love the back support. Would share more after a few months of usage.

  • TM
    TOMAS M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    February 16, 2026
    5 Stars

    Great back support if sitting at a computer all day

  • BM
    Battista M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    February 15, 2026
    5 Stars

    The chair is really comfortable and overall a great purchase. Assembly was straightforward, and the components feel solid and high quality. I sit in it more than four hours a day, and the backrest truly makes a difference. It provides excellent support and keeps my back feeling comfortable during long work sessions.

    A couple of days after setting it up, I noticed a slight squeaking sound coming from the seat area. At first I was concerned, but I quickly realized the issue was simply that a few screws needed to be tightened more securely. I spent about five extra minutes tightening everything properly, and the noise disappeared completely.

    Since then, the chair has been quiet, stable, and very supportive. The seat mesh feels breathable and firm in a good way, and the overall build quality gives me confidence it will last. I am very satisfied with this chair and would definitely recommend it for comfort, support, and ease of assembly.