30-Day Free Returns & 3-Year Warranty

Sihoo C300 Advanced Ergonomic Office Chair with Advanced Back Support

4.8
Rated 4.8 out of 5 stars
315 Reviews
Sale price $269.99 Regular price $319.99

Back-to-School Limited Offer: Only 165 Units Available – First Come, First Served

Color: Black
Version

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 315 reviews
Total 5 star reviews: 251 Total 4 star reviews: 59 Total 3 star reviews: 2 Total 2 star reviews: 0 Total 1 star reviews: 3
98%would recommend this product
Slide 1 selected
315 reviews
  • J
    Jenny
    I recommend this product
    Rated 5 out of 5 stars
    August 22, 2025
    Thoughtfully Engineered for Real Comfort — A True Ergonomic Upgrade

    After spending a few weeks using the SIHOO Doro C300 chair in my home office, I can confidently say it’s more than just another mesh desk chair — it’s a thoughtfully designed ergonomic solution that actually adapts to you rather than the other way around.

    🪑 Comfort & Ergonomics

    The standout feature here is the dynamic lumbar support. It responds naturally to your movement, offering real-time lower back support without needing constant manual adjustments. I didn’t realize how much I was slouching in my old chair until I sat in this — it gently keeps your posture aligned, even during long typing sessions.

    The seat depth adjustment is something you don’t see often at this price point. Being able to slide the seat forward/back allowed me to get just the right fit, which helped reduce leg fatigue on longer workdays.

    The 3D armrests adjust in height, depth, and angle, so I could position them exactly where I needed for keyboard work or meetings. It’s a small feature that makes a big difference in comfort.

    🌬️ Build & Materials

    The mesh backrest and seat are supportive yet breathable — ideal for long hours, especially in warmer environments. I didn’t experience any of the “mesh sag” or pressure points that can happen with lower-end chairs.

    The base feels solid, and the casters roll smoothly on hardwood without scraping. The overall construction gives off a premium vibe — nothing wobbles or creaks.

    🔧 Assembly

    Assembly took about 20–30 minutes, and the instructions were clear.…

  • TD
    tonio d.
    I recommend this product
    Rated 5 out of 5 stars
    August 21, 2025
    It finally came!!!

    This chair was orderedNeeded to toss them. some time ago, but the shipment was postponed a few times, I was offered to cancel if i wanted. I decided to wait it out. I am so very happy that I did. This chair is very comfortable. I did have to assemble it, it wasn’t difficult. The instructions are pretty easy to follow. Be warned the print is small, so if you need readers, have them handy. It came with the tools needed to assemble. It also included a pair of one size fits all work gloves, I wore them for 90% of the assembly. They didn’t have any grip so I eventually had to toss them. Every set of screws and washers came with a spare, so you are safe if you lose one.

    The adjustability when seated is very easy to operate. If you want to lean back, just lean back. It will hold you well in any position you choose. The back is well balanced. The cushions are very cool and breathable. You will not over heat seated in the chair for hours. All of the cushions are airy. It’s like a mesh.

    The armrests can adjust vertically and they pivot too.

  • EB
    ERIC B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    February 22, 2025
    5 Stars

    Excellent, sleek, ergonomic office chair at this price point. The mesh factor (vs other chair materials) makes a world of difference. Very comfortable and breathable, especially when working long desk job hours. Appreciate the many options for adjustability as well, all positions are addressed. Needed to contact Customer Support for a minor issue and they were very prompt and helpful, thank you! Overall great chair!

  • S
    Shay
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    February 20, 2025
    5 Stars

    I had a shack chair that I paid over $500 for it was good but it was too big for me I have to work 12-hour shifts most of which unfortunately I sit on my rear end I bought this based on some research. This chair is pretty amazing it was very easy to assemble I did it myself in less than an hour. So far no neck or back pain this week or last. I love all the adjustments on the arms it makes things so much easier. Great chair

  • A
    Alice
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    February 20, 2025
    5 Stars

    The chair is easy to assemble and very sturdy (great quality). One of the wheels broke after 3 days of use, but I contacted Sihoo through their official website, and they quickly shipped 2 replacements. Now it works perfectly! I would recommend it to anyone who is short and lightweight. I am 5 feet 4 inches and 108 pounds, and it fits me well.