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Sihoo S100 Dynamic Ergonomic Office Chair with Lumbar Support

Sihoo S100 Dynamic Ergonomic Office Chair with Lumbar Support

4.8
Rated 4.8 out of 5 stars
46 Reviews

"The most noticeable aspect of the S100 is its split lower lumbar support, which flexes along with body movements." Adam Corsetti, from Gamerant

Regular price $424.99
Regular price $708.99 Sale price $424.99
Sale Sold out
Shipping calculated at checkout.
Color: Black

Product Description

Doro S100 moves with you, featuring a wide integrated headrest and dual-side lumbar support for personalized comfort in any position, with easy adjustments to fit your needs.

Key Features

Dual lumbar support: Adapts to your movements for all-day lower back comfort.

Adjustable backrest and integrated headrest: Raise the headrest for neck support while relaxing, or lower it to focus on back and lumbar support while working—your choice for personalized comfort.

Recline up to 135°: Lean back with lumbar support that moves with you for easy relaxation.

Pressure-free seat: Waterfall-shaped cushion relieves pressure on your thighs and hips.

Breathable mesh: Stay cool and comfortable with durable, airflow-promoting mesh.

Easy seat depth adjustment: Adjust the seat depth to fit your height for better leg support.

4D armrests: Move them up, down, back, forth, and sideways for personalized comfort.

Built to last: Certified by BIFMA and SGS for safety and quality.

Materials

Bionic lumbar structure for adaptive support

The S100 features a bionic dynamic lumbar support system engineered to follow the natural curve of the lower back. Its multi-directional adaptive structure is designed to deform and respond automatically across different sitting positions and body shapes for more consistent lumbar contact.

Integrated upper-back support frame

The upper-back and headrest support are built into a connected frame structure that helps distribute pressure more evenly across the neck, shoulders, and back. The segmented height-adjustment design allows the upper support area to align more naturally with different users.

High-elastic wave mesh for breathable resilience

The backrest and seat use high-elastic wave mesh designed for airflow, elasticity, and long-term durability. The material provides breathable support while helping resist sagging, pressure deformation, and daily wear over time.

4D adjustable armrests with PU arm pads

The 4D armrests adjust in height, depth, and angle rotation to support a wider range of daily tasks. Soft PU arm pads provide a smoother contact surface and improved durability during long-term use.

Pressure-relieving seat with adjustable seat depth

The seat features a curved pressure-relief design that helps distribute body weight more evenly across the hips and thighs. The integrated seat depth adjustment mechanism allows the seating position to be fine-tuned for different leg lengths and sitting preferences.

Steel recline and height-adjustment mechanism

The chair uses a durable steel mechanism that supports seat height adjustment, multi-position recline, and stable everyday operation. The structure is designed to provide reliable control and consistent support during upright work, relaxed sitting, and rest.

Certified SGS gas lift for secure adjustment

The gas lift is tested to SGS and BIFMA standards to ensure stable, reliable height adjustment and long-term performance in everyday use.

PU silent casters that protect your flooring

The chair is equipped with durable PU casters that roll smoothly, reduce noise, and help prevent scratches on hardwood, tile, and other hard floor surfaces.

Heavy-duty steel base for everyday stability

The reinforced steel 5-star base provides dependable structural support and stable load-bearing performance for long-term daily 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 S100
Color:
Regular price $424.99
Regular price $708.99 Sale price $424.99
Sale Sold out
4 Reasons to Choose the S100
Support From Neck to Back
Support From Neck to Back
The integrated upper-back and headrest design helps support your shoulders and neck more naturally for a more connected sitting feel.
Lumbar That Adjusts With You
Lumbar That Adjusts With You
The bionic dynamic lumbar system responds to your posture and body shape to help keep lower-back support more consistent.
A Better Fit for More Bodies
A Better Fit for More Bodies
Dual lumbar support adapts to different body shapes for a more balanced fit and steadier lower-back support.
Easy Recline for Work and Rest
Easy Recline for Work and Rest
The 3-position recline makes it easy to switch between focused work, relaxed sitting, and deeper rest throughout the day.
 

For every part of you

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

Adjustable Support for Everyday Sitting

Integrated Head Support for Daily Comfort
The height-adjustable headrest works with the integrated upper-back design to support your head and neck more naturally through focused work, upright sitting, and more relaxed recline.
Seat Depth That Fits You Better
The adjustable seat depth helps the S100 fit different leg lengths and sitting styles more naturally, creating better thigh support and a more balanced sitting position.
4D Armrests for Flexible Support
The 4D armrests adjust in multiple directions to support your arms more naturally whether you’re typing, reading, or settling in for long hours at your desk.
3 Recline Modes for Work and Rest
Switch easily between upright focus, relaxed thinking, and a deeper recline when you need a break, with each angle designed to help you stay supported throughout the day.

Key Features for Better Sitting

Integrated Upper-Body Support
The S100 combines upper-back and head support in a more connected design, helping support your neck, shoulders, and back more naturally through long hours of sitting.
Adaptive Dynamic Lumbar Support
The bionic lumbar system responds to your posture and body shape, helping maintain more consistent lower-back support and reduce fatigue throughout the day.
A Better Fit for More Body Types
The dual lumbar support helps the S100 adapt more naturally to different body shapes and sitting positions for more balanced lower-back support.
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 at your desk.
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 Your Best Fit

Product
Sihoo S100 Dynamic Ergonomic Office Chair with Lumbar Support
Regular price $424.99
Regular price $708.99 Sale price $424.99
Sale Sold out
Doro C300 office chair
Regular price $359.99
Sale price $359.99
Sale Sold out
Sihoo Doro S300 "Gravity-Defying" Ergonomic Chair for Premium Comfort
Regular price $849.99
Regular price $1,416.99 Sale price $849.99
Sale Sold out
Name DORO S100 DORO C300 DORO S300
Best For Adaptive support with a more flexible upper-body fit Balanced everyday ergonomic support Premium ergonomic support with the most complete adjustability
Support Style Integrated and adaptive Responsive and balanced Advanced and weightless
Key Differences 4D armrests, seat depth adjustment, integrated upper-body support 4D coordinated armrests, dynamic lumbar, flexible backrest Anti-gravity recline, 6D armrests, dual dynamic lumbar
Lumbar & Back Dual adaptive lumbar with integrated back support Dynamic lumbar with a flexible backrest Dual dynamic lumbar with advanced full-body support
product weight 49.13 lbs 50.93 lbs 57.12 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 more adaptable fit with connected upper-body support You want a strong everyday upgrade for work, study, or gaming You want Sihoo’s most premium ergonomic chair experience

Find Your Best Fit

Sihoo S100 Dynamic Ergonomic Office Chair with Lumbar Support
Regular price $424.99
Regular price $708.99 Sale price $424.99
Sale Sold out
Doro C300 office chair
Regular price $359.99
Sale price $359.99
Sale Sold out
Name
DORO S100
Name
DORO C300
Best For
Adaptive support with a more flexible upper-body fit
Best For
Balanced everyday ergonomic support
Support Style
Integrated and adaptive
Support Style
Responsive and balanced
Key Differences
4D armrests, seat depth adjustment, integrated upper-body support
Key Differences
4D coordinated armrests, dynamic lumbar, flexible backrest
Lumbar & Back
Dual adaptive lumbar with integrated back support
Lumbar & Back
Dynamic lumbar with a flexible backrest
product weight
49.13 lbs
product weight
50.93 lbs
weight capacity
330 lbs
weight capacity
330 lbs
guarantee
(3) years warranty
guarantee
(3) years warranty
Choose It If…
You want a more adaptable fit with connected upper-body support
Choose It If…
You want a strong everyday upgrade for work, study, or gaming

Customer Reviews

4.8
Rated 4.8 out of 5 stars
Based on 42 reviews
Total 5 star reviews: 33 Total 4 star reviews: 9 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
Slide 1 selected
42 reviews
  • AV
    A V. R.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    9 months ago
    5 Stars

    This is an excellent office chair by SIHOO. My partner uses it and reports it's very comfortable. I want to share some notes I made while assembling this chair.* You need to have some upper body strength to lift and maneuver the chair portion onto the gas lift. Don't be too proud to ask someone for a hand.* Do NOT throw away the box! You need it for when you're attaching the seat and back to each other.* The instructions are packed inside the bag that holds the seat.* The instructions are in English, German, French, Italian, Spanish, Japanese, and Arabic.* There's a QR code in the instructions for a video showing assembly. Make sure you check the video's description for a link to the updated video.* Personally, I found it confusing when the printed instructions and the video demonstration both changed perspectives occasionally. Maybe you might, too.* This comes with white, cloth gloves, but they're on the small side.* The only tools you need would be something to get into the shipping box. I used scissors.* There are extra bolts and washers.* There are 2 sets of Washers J, but you use 4 at a time.* If you're looking for part P, the Decorative Cover, it's probably already on Base K.* The arm rest pieces come in a box, and if they're wrapped in different colored bubble wrap, it doesn't mean anything.* If you don't want your chair to have arms, feel free to omit them.* There are 5 black plastic pieces that have no part designation in the instructions. They go inside the silver…

  • CO
    Crash O.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    9 months ago
    5 Stars

    Love that the chair is so configurable, the seat slides backwards and forwards, height (Of course) - seat back adjusts up and down, arms slide forwards and back, adjustable height for the arms, just wish you could lock the rotation and actually lock the arm height. It's on a vertical ratchet, 4 clicks upwards then it resets and can drop back to the bottom. That's just a personal preference though and doesn't detract from the overall review of the chair.

  • A
    AC
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    9 months ago
    5 Stars

    I selected this for my son who was in need of a chair for his desk (mostly for playing games). I had purchased a gaming chair for my other son that had a lot of issues, so I wanted something with a more simple design. This chair was easy to assemble and really looks nice, quite modern. My son has been using it for a month or so now and seems to be very happy with the comfort with no complaints (although his brother's gaming chair definitely has some cooler features). The adjustments seem smooth and everything just works. Overall a great office chair option but the price is a bit steep.

  • HX
    human X.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    10 months ago
    5 Stars

    I was impressed by the comfort of the seat cushion. The width and thickness of the bottom make it soft and hard, and it doesn't feel uncomfortable or digging. The width adjustment is very smooth, and it is easy to find the best position for your desk and height. For a detail-oriented person like me, the design is really thoughtful. The tilt adjustment of the backrest is a bit a bit. Although the adjustment range is sufficient, the installation support of the backrest is not so uniform at some extreme angles, which makes it feel a bit awkward. In addition, the time spent on this chair was amazing. The icons on the manual are not very clear. It is possible that I was a little confused and could only operate it intuitively. However, after installing it, all problems disappeared.

  • FM
    Frank M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    10 months ago
    5 Stars

    This chair works for me very well. The best part for this chair is the 2-piece waist support. That makes my back very comfortable. The second good point is the recline feature. You can choose to move free or set at a fixed position by pushing the lower handle inward. The mesh structure fit my body perfectly, at the thighs, waist and the back. The heights of both the backrest and the armrest can be raised. It is fancy that when you raised to the highest level, they will go to the very bottom then start over again. I like to set everything to the lowest level, so I can keep my head straight. It is a pity that the seat can only set flat or move forward. If let me wish, I would wish the seat also able to recline.The installation is not hard, but you need to have mechanics experiences. The instruction is not easy to understand, especially the figures are too small to see the details.

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 S100 chair?

Assembly is quick and easy, most users finish in about 30–45 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: 35.2" × 22.2" × 14.8" (89.5 × 56.5 × 37.5 cm)
Shipping Weight: 62.7 lb (28.5 kg)