SIHOO Doro C300 Ergonomic Office Chair with Ultra Soft 3D Armrests, Dynamic Lumbar Support for Home Office Chair, Adjustable Backrest Desk Chair, Swivel Big and Tall Computer Chair Black
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Extended holiday returns
Returnable until Jan 31, 2026 Learn more
Returnable until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Dec 10 – Dec 12
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Color: Black
Style: Basic
Features
- Innovative Ergonomic ChairSIHOO's latest office chair has been developed using the latest technology to provide comfortable sitting while maintaining the correct posture for a healthy lifestyle. The ergonomic chair features an automatically adjustable 3D headrest, automatically adjustable lumbar support, linked 3D armrests, intelligent gravity structure and automatic adjustment. Following the concept of a "chair that sits on your body", the soft backrest and breathable mesh seat design provide a comfortable sitting experience, even after long hours of sitting.
- Wide Angle Adjustable Headrest and Trackable BackrestThe SIHOO A3 office chair features a 3D headrest with automatic macro adjustment, which can be adjusted 4.5cm up and down, 6.5cm back and forth and 20 angle. Made of soft mesh material, it is designed with the latest triangular soft elastic frame with triangular support straps from the shoulders to the lumbar area on both sides to support the back. The 4-position adjustable 6cm liftable backrest is suitable for people of all heights. When the backrest is adjusted to the highest level, it automatically reverts to 1 level.
- Domino auto-adaptive lumbar support and 3D linkage armrestThe SIHOO A3 office chair features a 3D automatic macro-adjustable headrest that can be adjusted 4.5cm up and down, 6.5cm back and forth and 20 angle. Made of soft mesh material, it is designed with the latest triangular soft elastic frame with triangular support straps from the shoulders to the lumbar area on both sides to support the back. The 4-position adjustable 6cm liftable backrest is suitable for people of all heights. When the backrest is adjusted to the highest level, it automatically reverts to 1 level.
- Intelligent gravity mechanismAutomatic adjustment functionIf it is the tilt function of the ergonomic chair, it is the key construction component. SIHU's newest chair features an intelligent gravity mechanism with weight-adjustable resilience, making it easy to operate at any weight. It has a 2-step auto-adjustment function and can be tilted to a maximum of 20 degrees from 92 degrees - 100 degrees - 112 degrees. Place your body on the back of the chair and enjoy a comfortable rocking motion. Or tilt it up to 112 degrees between work sessions for a short break and relaxation!
Brand: SIHOO
Color: Black
Product Dimensions: 15.35"D x 23.23"W x 30.31"H
Size: Oversized
Back Style: Solid Back
Brand: SIHOO
Color: Black
Product Dimensions: 15.35"D x 23.23"W x 30.31"H
Size: Oversized
Back Style: Solid Back
Special Feature: Adjustable,Durable,Flexible
Product Care Instructions: Wipe Clean
Unit Count: 1.0 Count
Recommended Uses For Product: Office
Maximum Weight Recommendation: 150 Kilograms
Style: Basic
Pattern: Solid
Finish Type: Plastic
Room Type: Office
Age Range (Description): Adult
Included Components: Arm Pad
Shape: S-Shape
Model Name: Doro C300
Arm Style: With arms
Surface Recommendation: Hard Floor
Seat Back Interior Height: 17.72 Inches
Indoor/Outdoor Usage: Indoor
Seat Height: 18.9 Inches
Seat Depth: 16.54 inches
Fill Material: Mesh
Leg Style: Tapered Leg
Arm Height: 31.7 Inches
Reclining Position Count: 3
Tilting: Yes
Is Customizable: No
Is Foldable: No
Chair Backrest Width: 21.26 Inches
Form Factor: Ergonomic
Manufacturer: SIHOO
Assembly Instructions Description: Assembly required. Follow the instructions provided to set up the chair.
Item Weight: 36.3 pounds
Item model number: DORO-C
Date First Available: May 29, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Dec 10 – Dec 12
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Color: Black
Style: Basic
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 they will last. They may not have the pitch and extra customizability of a more expensive chairs' armrests, but they can slide forward and back and they have a large degree of rotation. I have been able to leavearge the rotation abilities offered, piared with the shape of the armrest, to find a comfortable position regardless of my various uses/needs. All-in-all, I feel it is a fantastic chair for the price and I highly reccomend it! (If Sihoo is reading this, I wish I could add-on a moderately priced, attachable footrest to this chair. 😉) End of novel.
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Reviewed in the United States on September 15, 2024 by Amanda Dedinsky
Color: Black
Style: Basic
Excellent product, easy to assemble, very comfortable, has too many different positions including armrest, the lumbar support is very good. I recommend
Reviewed in the United States on September 20, 2025 by Ricardo
Color: Black
Style: Upgrade with Footrest
I got it today and took me about one hour to put it together. If you don't like IKEA you might not enjoy all the screws and pieces. But if you can endure that - the result is worth it! The chair itself is solid, supportive and comfortable. My back muscles will be a little sore for a few days, but simply cause I have a crappy posture and I’m not used to sit this well. But I did a lot of research and this has the same economics of way more expensive premium chairs at half the price. To me was a back health investment considering I have to sit on it for 8 hours a day minimum.
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Reviewed in the United States on October 16, 2025 by Irene
Color: Black
Style: Basic
I like this chair, but I’m disappointed by SIHOO’s misleading marketing approach. My friends and I have used SIHOO chairs in China for years, trusting them for cost-effectiveness and quality. When we come to US, we naturally choose SIHOO again. To my surprise, the overseas C300 model severely compromises the brand’s value. Before buying, we noticed that overseas versions (like the S100 and C300) lack a footrest found in the Chinese versions, but we didn’t know why. Once I received the C300, I still found it comfortable and well-built. However, after reading more on Chinese review videos, I realized the overseas C300 is essentially a downgraded product that conflicts with the SIHOO Doro series’ original concept. Key differences: 1. The original version uses a gravity-sensitive tilt mechanism with wire controls, while the overseas version uses simpler pole controls. 2. The original has a seat-depth adjustment feature, but the overseas version does not. 3. The tilt angle advertised in Chinese official website is 95°–145°, while the English site states 92°–112°, and 110°–130° on Amazon. This discrepancy suggests an inferior tilt mechanism. 4. The base is downgraded from a single integrated unit to five separate pieces. In China, the original costs about $220–$250 with free on-site installation — a product more comparable to the $400 overseas C300 Pro (2024.12.8), which offers flip-up armrests and adjustable seat depth, though it remains inferior to the original C300 in terms of tilt mechanism and base. Why did I keep digging reviews after receiving a decent chair? Because the manual doesn't include Chinese, even though it provides English, German, French, Italian, Spanish, Japanese and Arabic! I feel misled by the identical product name. Although regional differences are understandable, the abundance of information on Chinese Internet set my expectations too high. If I had known the overseas C300 was so different, I would have chosen the C300 Pro instead. When considering only the overseas versions, I can hardly recommend SIHOO chairs to my friends because, despite also being made in China, I have no idea where the overseas versions' factory is, what the cost and workmanship are like, so I can't judge the cost-effectiveness. In terms of C300 quality alone, I am 5'6" tall and weigh 155 pounds, and the size of this chair suits me well, with good attention to detail in workmanship. Update on 2024 Dec 28: According to information from the Sihoo customer service team, the C300 model in the US is actually the C100 in China (and it seems to be the C100 Gen 1 instead of Gen 2). And they said they will make certain improvements to some issues mentioned above. In view of the long long email conversations, I believe Sihoo's customer service department treated with their products with care, so I changed the rating.
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Reviewed in the United States on December 8, 2024 by Q Q
Color: Grey
Style: Upgrade with Footrest
Sihoo home/office chair is comfortable, good support and a fair price. It’s also easy to assemble with good instructions.
Reviewed in the United States on November 1, 2025 by Robert Grice