Sihoo C300 Pro Ergonomic Office Chair with Seat Depth for Long Sitting
Benefits
Benefits
- Supports up to 300 lbs
- Dynamic lumbar support for all-day back comfort
- Designed to fit users from 5' to 6'3"
- Spacious cushion with adjustable seat depth
- 6D adjustable armrests for versatile support
- Easy adjustments with a single handle
- Certified by BIFMA and SGS for quality and durability
- Endorsed by The Gadgeteer, MMORPG, and loved by thousands of workers for ergonomic excellence
Promises
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.
Payment methods
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How to choose a right ergonomic office chair?
Check out our buying guide for you!
Dynamic Lumbar Support: The advanced lumbar support system automatically adjusts to your spine, providing continuous back comfort without the need for manual tweaks.
Adaptive Design: Designed to fit users from 5' to 6'3", ensuring everyone can enjoy optimal support.
Spacious Cushion: The larger seat cushion enhances comfort and offers plenty of space for bigger individuals, with an adjustable seat depth for a perfect fit.
6D Adjustable Armrests: The armrests adjust in six directions—up and down, back and forth, in and out, rotated inward and outward, and include a linked recline experience—offering versatile support during long hours of work, study, or gaming.
Easy Controls: Adjust the seat height, depth, and recline angle effortlessly using a conveniently placed handle for a personalized fit.
Flexible Backrest: The streamlined backrest flexes to match your movements, offering continuous support as you shift positions.
Precise Headrest Adjustment: Adjust the headrest up and down, back and forth, or rotate it to get just the right neck support and comfort.
Sleek Design: With its modern look, the Sihoo Doro C300 Pro enhances any workspace, fitting seamlessly into your office, study, or home.
Breathable Mesh: The fully breathable mesh design is elastic, soft, and skin-friendly, ensuring comfort while being durable and easy to clean.
Weight-Sensing Technology: Adaptable to various sizes and weights, this chair provides a balanced reclining experience through advanced weight-sensing technology.
1. What makes the C300 Pro different from the standard C300?
The C300 Pro features adjustable seat depth, allowing for a customized fit for larger users, while the standard C300 does not offer this adjustment. And C300 Pro has 6D armrest support.
2. How does the lumbar support work in the C300 Pro?
The C300 Pro has dynamic lumbar support that automatically adjusts to your spine, providing continuous back comfort without manual adjustments.
3. Can the C300 Pro accommodate taller users?
Yes, the C300 Pro is designed to fit users from 5' to 6'3" and more, ensuring optimal ergonomic support for a wide range of heights.
4. What is the advantage of the adjustable headrest in the C300 Pro?
The independent headrest can be adjusted for height and depth, offering customizable neck support, which is especially beneficial during long gaming or work sessions.
5. How do the armrests on the C300 Pro enhance comfort?
The 6D adjustable armrests can be moved in multiple directions, providing versatile support for different activities, whether you’re working or gaming.
Sihoo Ergonomic Research Institute
"Relax and let inspiration flow—sit well and think better."
Key Features
Dynamic Lumbar Support
Flexible Backrest
Bigger W-Shaped Cushion
Seat depth adjustment
I took the C300 Pro to work, where I sit for eight hours a day. It is way more comfortable than my basic office chair, and its high-tech look gets plenty of attention from everyone else in the office.
Adjustable seat depth for custom comfort
Doro C300 Pro’s expanded seat cushion provides a more spacious seating area for larger individuals, enhancing comfort. The adjustable seat depth allows for personalized positioning to suit your needs.
Adjustable anti-spine lumbar support
The BM (Body Movement) Tracking System ensures the lumbar support automatically conforms to your spine to keep your back comfortable and supported during different postures without the need for manual adjustment.
The mesh fabric provides plenty of support without all of the sweatiness of a leather gaming chair. All of the adjustability options of the C300 Pro allow you to comfortably sit for hours on end while you game away.
How C300 Pro Chair Helps?
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Flexible seat back that contours to your back
When you move your upper body around or reach down to the side to pick up a pen you drop, the streamlined backrest with triangular frame flexes and matches your back, providing continuous support.
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Full-back comfort for any size
Easily adjust the headrest up and down, back and forth, or rotate it to fit the curve of your neck, giving you the perfect support and comfort. The wide surface also offers enough space to rest your head comfortably on the side.
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Designed to elevateyour workspace
Doro C300 Pro features a sleek, modern design inspired by ergonomic human spine. It’s comfortable to sit on and looks great, making it a perfect fit for your office, study, or home.
Comfort, Control, and Durability
6D Adjustable Armrests
All Controls on Right-hand Side
Breathable Mesh Design
Pressure-free BM Tracking System
Built for Last (BIFMA & SGS)
Specifications
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Chair back lifting height: 44.72" - 50.91"
Seat depth: 16.81"-17.76"
Max hip width: 20.28"
Maximum load: 300 lbs
Armrests: 6D coordinated armrests (up and down, left and right, front and back, inward and outward, with tilt-lock of armrests, and synchronized recline)
- DCDylan C.Rated 5 out of 5 starsSeptember 16, 2025Awesome chair good service!
Great chair! They covered my warranty even after the mechanism had broke and screws snapped. Free of charge and I got a nice new chair! 5 stars. On top of that I absolutely love this chair and would rather get a new one rather than swap. Amazing value!
- KMKen M.Rated 5 out of 5 starsSeptember 10, 2025Looks great, easy to assemble with heavy duty components. Oh...and to me it is very comfortable.
First impression before I started the assembly was that this chair is heavy, and it is. But more than just being heavy, the components feel more robust with may an exception for the armrests. The arm rests are secure, however, because there are so many adjustments the actual arm rests turn and slide easily than I am used to but I got used to the feel quickly. The assembly was easy with much better instructions and many of the other office chairs that I have assembled over the years. I do like that the included the required tools, I opted to use my impact drill to speed things up a little then I used the T-Wrench to do a final check of each bolt just to be sure they were tight. As I was assembling this chair, the heft of each component was impressive and the craftsmanship was much better than I was expecting (to be honest). Once I got the chair assembled the initial test drive was comfortable and easy to operate all of the adjustments. Adjusting the arm rest height was pretty straight forward by lifting to the desired position or pulling all the way to the top to release the catches to return to the bottom setting. The metal arm rest bars are very solid, there is a slight wiggle in the upper plastic part that should be expected with combining metal and plastic components. The seat and back rest are very comfortable with the mesh material providing nice airflow for temperature regulation. I do like that when you lean back in this chair the seat stays in place with only the back…
- SMShen M.Rated 5 out of 5 starsSeptember 9, 2025Worth every penny!
Got it during the Prime day deal. Such a great office chair with lots of possibilities to adjust to your liking. Super sturdy. Gives you enough back and neck support. Worth every penny!
- MSMegan S.Rated 5 out of 5 starsSeptember 9, 2025A desk chair for the ages
This chair has been nothing but amazing to me from initial assembly to late night gaming...followed by some insightful product reviews ;) Yes indeed, I have been sitting at this computer for the past 3 hours and not once have my legs gotten sore. Not a single time did I bemoan the lack of lumbar support because, let me tell you, the lumbar support is plentiful. No matter whether I want to sit forward with excellent posture or relax back with my head on the headrest, this chair will walk with me to the ends of the earth. If you are looking to glow up your desk setup, I encourage you to buy this desk chair.
- SSS. S.Rated 5 out of 5 starsSeptember 1, 2025Beautiful chair for larger people or anyone
This is what every high-end chair should be like! What an amazing chair. It’s honestly so comfortable and it feels like it was designed for my body. I have friends who have used it who are very different sized than I am and they are just as comfortable. The best chair for all size people.
