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New Arrival → C300 Pro V2

Sihoo C300 Ergonomic Office Chair with Advanced Back Support

4.9
Rated 4.9 out of 5 stars
958 Reviews
Sale price $269.99 Regular price $559.99
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Color: Black
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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.
  • 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.

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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: 50.93 Ibs

    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 958 reviews
Total 5 star reviews: 880 Total 4 star reviews: 70 Total 3 star reviews: 3 Total 2 star reviews: 1 Total 1 star reviews: 4
99%would recommend this product
Slide 1 selected
958 reviews
  • JP
    Jennifer P.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    May 31, 2026
    5 Stars

    I am 6'1" and around 220 lbs. The chair fits me very well and feels stable. I especially like how the backrest adapts instead of forcing one sitting position.

  • RE
    Ronald E.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    May 23, 2026
    5 Stars

    I switched from a gaming chair and the difference is huge. Much better support and the mesh keeps me cool.

  • KR
    Kevin R.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    May 23, 2026
    5 Stars

    I have chronic lower back discomfort and decided to invest in something ergonomic. The C300 has been fantastic. I was able to adjust it quickly and immediately noticed the support around my lower back. The chair encourages better posture without feeling stiff. I have now used it for over three months and I am still impressed.

  • MG
    Michelle G.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    May 18, 2026
    5 Stars

    I am a software engineer and spend most of the day sitting. After several weeks, I can say the C300 is probably the most comfortable chair I have used. The backrest movement feels very natural, and the seat remains comfortable during long coding sessions. I also appreciate how easy it is to keep clean.

  • KL
    Kimberly L.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    May 17, 2026
    5 Stars

    The headrest is surprisingly comfortable during breaks. I can recline and relax without putting pressure on my neck. Small detail, but it makes a big difference.