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Sihoo C300 Ergonomic Office Chair with Advanced Back Support

4.8
Rated 4.8 out of 5 stars
364 Reviews
Sale price $269.99 Regular price $559.99

Color: Black
Version

C300 - White Version is restocked!

Benefits

  • Supports up to 300 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.

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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: 300 lbs

    Warranty: (3) years warranty

  • Sihoo Doro C300 Ergonomic Office Chair Specifications

    Chair back lifting height: 18.11" - 21.65"

    Seat depth: 17.13" - 18.11"

    Max hip width: 20.28"

    Maximum load: 300 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

4.8
Rated 4.8 out of 5 stars
Based on 364 reviews
Total 5 star reviews: 299 Total 4 star reviews: 60 Total 3 star reviews: 1 Total 2 star reviews: 1 Total 1 star reviews: 3
99%would recommend this product
Slide 1 selected
364 reviews
  • CD
    Carpe D.
    I recommend this product
    Rated 5 out of 5 stars
    November 25, 2025
    A comfortable, supportive chair with thoughtful features

    Overall, this is a solid office chair. The lumbar support really makes a difference if you're sitting for long hours, and the headrest actually lines up with your neck when sitting upright—which isn't always the case with ergonomic chairs.The mesh is breathable and comfortable, and the build quality feels solid. The chair feels stable and substantial once assembled. There are quite a few adjustment points, and most of them work well. I do wish the backrest could go just a bit higher, but that’s a personal preference more than a flaw. Assembly was manageable. Some parts are heavy, and the armrest installation can be tricky to line up, especially if you're doing it solo. Having your own tools helps, but the kit does include what you need.The armrests are soft and adjust in multiple directions. If you’re looking for a chair that supports good posture and doesn’t get uncomfortable after long work sessions, this one does the job well.

  • S
    S.B.astic
    I recommend this product
    Rated 5 out of 5 stars
    November 10, 2025
    Comfortable

    Easy to assemble and very comfortable. Lot of adjustment setting to get just the right fit for you. Looks good and is built well with quality materials.

  • R
    Rafael
    I recommend this product
    Rated 5 out of 5 stars
    November 5, 2025
    Good, but could be better.

    This chair promotes great posture and offers solid lumbar support. Once you get used to the adjustments, it feels really ergonomic and supportive. The build is sturdy, and it helps me sit correctly for long hours. Overall, a comfortable and well-designed office chair.

  • LF
    Leona F.
    I recommend this product
    Rated 5 out of 5 stars
    October 31, 2025
    Really nice chair

    A strong, supportive chair that’s comfortable for long work sessions. The reclining lock feature works great, and the mesh back keeps things cool. Assembly takes a bit of effort, but once it’s done, you can feel the quality. Great comfort overall and a nice, modern look.

  • L
    L'uva
    I recommend this product
    Rated 5 out of 5 stars
    October 31, 2025
    Well made chair

    Very well-built and sturdy chair with excellent lumbar and headrest support. I love the smooth recline and how the lumbar automatically adjusts to your posture. The mesh material is breathable and feels high-quality. My wife loves it so much it ended up in her sewing room, definitely a great buy for long hours of sitting.