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)
- ISiCheckout S.Rated 5 out of 5 starsOctober 24, 2025Longer Screen Time Results In Upgraded Seating
With each passing season, my desk time has noticeably increased, creating a need for a superior seating solution, and I'm thrilled to have located this computer chair.This chair is one of the most ergonomic and adjustable options available, providing great comfort for long hours of sitting.It’s easy to adjust to fit your body perfectly so you won’t feel sore or achy after use. You can customize the armrests and seat height for comfort, ensuring good posture.In summary, the chair's construction is excellent, and it provides superb support, which I greatly appreciate, given my long hours spent working at my desk.
- MMarieSVerified BuyerRated 4 out of 5 starsOctober 23, 2025Fabulous Chair for My Needs
This is my experience with the Sihoo Doro C300 Pro chair. As a retired individual who spends approximately 4 to 6 hours sitting each day, I realized the need for a standing desk and an improved chair. This led me on a lengthy journey of research and contemplation.
Over the course of more than three months, I pondered my options, read countless reviews, asked questions, and even prayed for guidance. Ultimately, I decided on the Sihoo C300 Pro chair for several reasons: the positive reviews, the convenience of a warehouse located in my home state, and their accommodating return policy. The fact that Sihoo would provide a return label and pick up the chair if needed was a significant advantage for me.
Assembly - My husband and I assembled the chair in about 45 minutes. The process might have been quicker, but each time I did something right, my husband paused to give me a hug —making the experience more enjoyable, funny and a bit slower! Although the assembly instructions included with the chair were not very helpful for us, especially since I am a visual learner, the instructional video proved to be perfect. A word of caution: if your chair comes with a footrest, be sure to attach the footrest before the headrest, as the video we watched did not include instructions for installing the footrest.
Features - The chair was securely packed and well protected from rough handling. In terms of comfort, the chair is excellent. It is easily adjustable, solidly built, and visually…
- MRMrs R. M.Rated 5 out of 5 starsOctober 22, 2025YEEESSSSSSS!! IT’S EXACTLY WHAT MY DAUGHTER WANTED!!!
My daughter is an artist and sits a lot painting and sketching for commissions… this is so comfy for her to sit in hours on end!!!
- HHanzoRated 5 out of 5 starsOctober 20, 2025incredibly comfortable
The office chair feels incredibly comfortable with its ultra-soft armrests and dynamic lumbar support. After using it for long hours, I noticed a significant reduction in back pain, which was a game-changer for me. The chair's design is sleek and easy to put together, and it's holding up really well over time. I love how adjustable it is, especially the 2-way headrest and the height settings, making it super customizable to my needs. Overall, it’s definitely a great value for the price!
- KCKevin C.Rated 5 out of 5 starsOctober 18, 2025Durable and high quality office chair
Excellent quality and durable, even for larger people. I like the lumbar support that you can adjust at the back. The packaging is very heavy, and the chair is too, which makes it a bit difficult to roll/move around. Overall, however, this is a great office chair for the price point.
