New Arrival → C300 Pro V2

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Sihoo C300 Ergonomic Office Chair with Advanced Back Support

4.9
Rated 4.9 out of 5 stars
921 Reviews
Sale price $279.99 Regular price $559.99
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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.
  • 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: 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 921 reviews
Total 5 star reviews: 845 Total 4 star reviews: 69 Total 3 star reviews: 2 Total 2 star reviews: 1 Total 1 star reviews: 4
99%would recommend this product
Slide 1 selected
921 reviews
  • SC
    Sam C.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    May 3, 2026
    5 Stars

    I bought this chair mainly because I started having lower back fatigue after working from home every day. After using the C300 for about a month, I noticed I could sit longer without needing to constantly stretch or stand up. The lumbar support is more active than traditional office chairs and keeps contact with your back even while reclining. The mesh back also keeps airflow moving, which helps a lot during long afternoons. It is not a super soft lounge chair, but that is exactly why it works well for productivity. Feels supportive without being uncomfortable.

  • MD
    Massimo D.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    May 2, 2026
    5 Stars

    Took about an hour to assemble, but the quality feels solid once everything is together.

  • PN
    Paul N.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    May 1, 2026
    5 Stars

    I bought the C300 after comparing it to several much more expensive ergonomic chairs. Obviously it is not exactly the same as a chair that costs over 1,000 dollars, but honestly, for everyday work, it gets surprisingly close in comfort. The mesh is supportive without feeling stiff, and the seat does not trap heat the way foam cushions do. I also like the armrests more than expected because they move naturally with the recline. That small detail makes a big difference during long typing sessions. After 4 months of use, there are still no squeaks or loose parts. I would absolutely recommend it for home office setups.

  • MS
    Michael S.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 29, 2026
    5 Stars

    I work remotely full time and spend around 9 hours a day at my desk. Before buying the C300, I was constantly shifting around trying to get comfortable. After about two weeks with this chair, I noticed I could focus longer without thinking about my back or shoulders all day. The mesh seat stays cool, even during warmer afternoons, and the reclining tension feels smooth instead of stiff or jerky. Assembly took me about 50 minutes alone. The instructions were mostly clear, although attaching the backrest would definitely be easier with a second person. Overall, this is the first office chair I have owned that actually feels designed for long work sessions instead of just looking ergonomic.

  • AG
    Andrea G.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    April 2, 2026
    5 Stars

    I have owned the chair for around 7 months now. Daily use, probably 8 to 10 hours most weekdays. The mesh still feels tight, the frame does not wobble, and the wheels roll quietly. What surprised me most is how much I appreciate the dynamic support system. Instead of one fixed lumbar bump, the support changes naturally as you move. It makes the chair feel more responsive and less rigid than traditional ergonomic chairs. The armrests are also useful because they move with the recline. Small detail, but it helps keep my shoulders relaxed. Definitely one of the better purchases I made for my office.