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Sihoo C300 Ergonomic Office Chair with Advanced Back Support

Sihoo C300 Ergonomic Office Chair with Advanced Back Support

4.8
Rated 4.8 out of 5 stars
46 Reviews

"The netting material makes the chair comfortable on hot days, durable, and able to withstand extended use." Mark Sparrow, from Forbes

Regular price $359.99
Sale price $359.99
Sale Sold out
Shipping calculated at checkout.
Color: Black

Product Description

Doro C300’s lumbar support adjusts to your spine’s contours, providing comfort and back support in any position without manual adjustments.

Key Features

Breathable mesh that keeps you cool

Full mesh seat and back promote continuous airflow to prevent heat and sweat during long hours.

Adaptive backrest that moves with you

A flexible, streamlined backrest maintains your natural spine curve and supports your posture as you shift and move.

Personalized support where you need it

Dynamic adjustable lumbar support and a fully adjustable headrest fit your body for customized comfort.

Versatile 4D armrests that move with your recline

Soft, multi-directional armrests adjust to every task and stay aligned with your arms even when you lean back.

Relaxing, pressure-relieving recline

Smooth tilt and a waterfall-edge seat reduce thigh pressure and help you unwind without losing support.

Built strong, tested safe

Premium components and certifications from BIFMA and TÜV ensure long-term durability and reliability.

Materials

PA-reinforced structure for stronger support

High-strength PA + fiberglass is used in the headrest, lumbar support, and key structural components for better rigidity, stability, and long-term durability.

Flexible soft-gel back support frame

The backrest integrates an elastic soft-gel support system that forms a resilient triangular structure, allowing natural flex and adaptive movement.

High-elastic wave mesh for breathable comfort

The headrest, backrest, and seat all use high-elastic, high-coverage wave mesh that’s breathable, skin-friendly, and resistant to sagging, pressure, and tearing.

Versatile 4D armrests with recline sync

Cushioned 4D armrests adjust up/down, forward/back, left/right, and rotate, while moving in sync with the backrest when reclining, providing continuous arm support in any posture.

Pressure-relieving seat pan

A curved, high-resilience seat cushion distributes weight evenly and reduces pressure on your thighs and hips, providing comfort whether you’re leaning forward or reclining.

Durable tilt and height adjustment mechanism

The self-weight-adjusting tilt mechanism and SGS-certified gas lift ensure smooth reclining, secure height adjustment, and reliable long-term performance.

Certified SGS gas lift for secure performance

The gas lift passes SGS and BIFMA certifications to ensure stable, reliable height adjustment over time.

PU silent casters that protect your flooring

Durable PU wheels glide smoothly, reduce noise, and prevent scratches on hardwood or tile floors.

Heavy-duty 350-grade steel base

The reinforced steel 5-star base provides excellent stability and load-bearing performance for everyday use.

Promise

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.

Satisfaction Guarantee: For any issues, contact support_ca@sihoo.com for prompt assistance and guaranteed satisfaction.

  • Overcome sitting pain
  • Save money
  • Enhance workplace
  • Sustainable development
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DORO C300
Color:
Regular price $359.99
Sale price $359.99
Sale Sold out
4 Reasons You’ll Love the C300
Stay Cool Through Long Hours
Stay Cool Through Long Hours
Breathable high-elastic mesh across the seat, back, and headrest helps improve airflow, so you stay cooler and more comfortable through work, study, or gaming.
Support That Follows You
Support That Follows You
The flexible backrest and dynamic lumbar support move naturally with your posture to help reduce lower-back fatigue and support healthier sitting.
Arm Support That Moves
Arm Support That Moves
With 4D coordinated armrests that move with the backrest as you recline, the C300 helps keep your arms supported whether you’re working upright or leaning back.
Less Pressure While You Sit
Less Pressure While You Sit
The contoured seat helps distribute pressure more evenly across your hips and thighs, making long sitting feel more balanced and less tiring on your body.
 

For every part of you

Enhance your posture, relieve your stress—sit well and work better.

Adjustable Support in Any Sitting Position

3D Headrest for Daily Neck Support
The dual-joint headrest adjusts to support your head and neck through focused work, upright sitting, and more relaxed recline. It helps reduce upper-body tension and makes long hours feel more comfortable.
Flexible Back Support That Moves With You
The elastic backrest flexes naturally with your posture, while dynamic lumbar support helps maintain more consistent support from your upper back to your lower back. The result is a more balanced sitting feel through long work sessions.
4D Armrests That Stay in Sync
The 4D coordinated armrests adjust in multiple directions and move with the backrest as you recline, helping keep your arms supported whether you’re typing, working, or leaning back to reset.
3 Recline Modes for Work and Rest
Switch easily between upright focus, relaxed thinking, and a deeper recline when you need a break. Each angle is designed to help you stay supported and comfortable throughout the day.

Key Features To Sight Right

Balanced Full-Body Support
The C300 is designed to support your head, back, hips, and shoulders in a more balanced way, helping you stay aligned and comfortable through long work, study, or gaming sessions.
Dynamic Lumbar Support
The adaptive lumbar system responds naturally as you change posture, helping maintain lower-back support and reduce fatigue whether you’re sitting upright or reclining.
Breathable High-Elastic Mesh
Breathable mesh across the seat, back, and headrest helps improve airflow, so you stay cooler, drier, and more comfortable through long hours of sitting.
Smart Weight-Sensing Recline
The weight-sensing mechanism helps the chair respond smoothly as you sit upright, lean forward, or recline, creating a more stable and natural sitting experience.
Pressure-Relief Seat Design
The contoured seat and waterfall edge help reduce pressure on your hips and thighs while supporting healthier leg comfort during extended sitting.
Stable Base, Smooth Glide
The durable steel base helps keep the chair stable and well-balanced, while PU casters roll smoothly and quietly to help protect your floors during daily movement.
Certified Quality, Trusted by Experts
 

Find the Right Fit

Product
Doro C300 office chair
Regular price $359.99
Sale price $359.99
Sale Sold out
Sihoo C300 Pro Ergonomic Office Chair with Seat Depth for Long Sitting
Regular price $589.99
Regular price $799.99 Sale price $589.99
Sale Sold out
Sihoo S100 Dynamic Ergonomic Office Chair with Lumbar Support
Regular price $424.99
Regular price $708.99 Sale price $424.99
Sale Sold out
Name DORO C300 DORO C300 PRO DORO S100
Best For Balanced everyday ergonomic support Long-hour work with more adjustability Flexible head & neck support
Support Style More responsive and personalized Clean and streamlined Adaptive and balanced
Key Differences 4D adjustable armrests, independent 3D armrest 6D adjustable armrests, independent 3D armrest 4D adjustable armrests, integrated armrest
Lumbar & Back Dynamic daily support More refined support and alignment Strong back support
product weight 50.93 lbs 55.34 lbs 49.13 lbs
weight capacity 330 lbs 330 lbs 330 lbs
guarantee (3) years warranty (3) years warranty (3) years warranty
Choose It If… You want a strong everyday upgrade You want the most complete workday support You prefer a cleaner upper-body feel

Find the Right Fit

Doro C300 office chair
Regular price $359.99
Sale price $359.99
Sale Sold out
Sihoo C300 Pro Ergonomic Office Chair with Seat Depth for Long Sitting
Regular price $589.99
Regular price $799.99 Sale price $589.99
Sale Sold out
Name
DORO C300
Name
DORO C300 PRO
Best For
Balanced everyday ergonomic support
Best For
Long-hour work with more adjustability
Support Style
More responsive and personalized
Support Style
Clean and streamlined
Key Differences
4D adjustable armrests, independent 3D armrest
Key Differences
6D adjustable armrests, independent 3D armrest
Lumbar & Back
Dynamic daily support
Lumbar & Back
More refined support and alignment
product weight
50.93 lbs
product weight
55.34 lbs
weight capacity
330 lbs
weight capacity
330 lbs
guarantee
(3) years warranty
guarantee
(3) years warranty
Choose It If…
You want a strong everyday upgrade
Choose It If…
You want the most complete workday support

Customer Reviews

4.8
Rated 4.8 out of 5 stars
Based on 46 reviews
Total 5 star reviews: 35 Total 4 star reviews: 11 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
Slide 1 selected
46 reviews
  • EB
    ERIC B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    8 months ago
    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
    8 months ago
    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

  • Y
    YJ
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    5 Stars

    In my opinion, the chair is designed for working rather than gaming. It doesn't offer you a feeling on but makes you feel better when working on the table for a long time. It has a discontinuity point between shouder and lumber. Some people will think it is uncomfortable, but it helps your sacral bone in right position that prevent low back pain.

  • E
    Evan
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    5 Stars

    While the chair didn't end up being a great fit for my long legs(I'm 6'1), the customer service team at SIHOO went above and beyond to try and remedy the issue. If you have any questions or concerns reach out to them via email and they'll give prompt replies and do what they can to address your questions.

  • AD
    Amanda D.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    5 Stars

    I've used this chair for 3 months now, and I have zero regrets! I purchased this chair on sale, but the chair feels worth their original listed price.The mesh material has a nice, bouncy give to it that feels very comfortable when sitting. The mesh has a strategically used rubber texture that gives it some grab and prevents a sliding feeling when leaning.The plastic skelatal structure feels high-quality, and the base of the chair feels weighty and well built. The lean-back position on the chair feels great too. I haven't found a way to tilt the chair, but the lean-back feature and the shape of the base has made that a non-issue.I also haven't figured out if there is a way to further customize the lumbar support, but it feels adequitly placed and pronounced by default. A great feature of it is that it slides and automatically readjusts to your back when leaning. The entire backing of the chair can be raised or lowered as one piece.The highly customizable headrest was a selling point for me and I am VERY pleased with it. It can ARCH forward or back at multiple positions, TILT foward or back and pultiple positions, and SLIDE up or down in multiple positions. I can get it to the perfect position on my neck and get perfect head-support!The 5 metal legs and plasic rollers feel heavy and strong.The arms are adequit. They can't hug closer to your body, and the material on the armrests feel a little more stiff and frictiony than I might have originally perfered, but they feel like…

Frequently asked questions

Where do you ship?

We ship directly from our local Canadian warehouses for fast delivery and smooth service.

Do I need to pay customs or import fees when ordering from Canada?

No worries, Sihoo has two local warehouses in Canada, so your order ships domestically with no customs or import fees.

Is the 30 day trial risk free?

Yes! Every Sihoo chair purchased from our official Canadian website includes a 30-day risk-free trial.

Try it in your home or office, and if you’re not completely satisfied, simply contact us within 30 days for a full refund. No hidden fees, no catch.

What is Sihoo's return policy?

You can return your chair within 30 days of receiving it for any reason. We’ll arrange the return process and refund your purchase once the product is received back in its original condition and packaging.

What is included in the 3 year warranty?

All Sihoo chairs are backed by a 3-year limited warranty, covering manufacturing defects in materials and workmanship under normal use.


This includes the frame, base, casters, gas lift, and mechanism components.

How long does it take to assemble the C300 chair?

Assembly is quick and easy, most users finish in about 20–30 minutes with the included tools and instructions.

What are the size and weights of the packaging?

Each Sihoo C300 ships in one securely packed box for easy handling.


Approximate dimensions and weight:
Box Dimensions: 30.3" × 21.7" × 15" (77 × 55 × 38 cm)
Shipping Weight: Approx. 65 lb (29.5 kg)