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Extended holiday returns
Returnable until Jan 31, 2027 Learn more
Returnable until Jan 31, 2027 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2027
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
11 left in stock
Arrives
Thursday, Nov 19
At a glance
- Condition
- New
- Color
- Light White
- Size
- Pack of 1
- Model
- M18
- Dimensions
- 28.35 x 28.72 x 58 in
- Weight
- 38.3 lb
- Material
- Mesh
- In the box
- Arm PadBase PlateCasterCushionLED Light
Features 7
- ADAPTIVE DYNAMIC LUMBAR SUPPORT Long hours at your desk shouldnt leave your lower back aching. The SIHOO B100 ergonomic office chair features elastic lumbar support with a dual-back design that moves with your spine. Lean forward to focus, sit upright in meetings, or shift positions throughout the daythis desk chair adapts with you, keeping your back supported and comfortable without feeling stiff.
- RETRACTABLE FOOTREST FOR FULL RELAXATION Pull out the smooth footrest and stretch out fully. Lean back, relax, and transform this computer chair into a personal lounge for quick power naps, gaming sessions, or movie breaks after work. Comfort follows your every move.
- 4D ARMRESTS & LOCKABLE RECLINE Adjust, rotate, or flip the 4D armrests to fit your posture or slide neatly under your desk. Three recline angles (110 / 125 / 135) let this office chair shift effortlessly from focused work to relaxing breaksperfect for home offices, gaming, or long study sessions.
- PLUSH CUSHION & ULTRA-WIDE HEADREST The widened seat cushion spreads weight evenly for lasting comfort. The 3D ultra-wide headrest supports your neck naturally, keeping shoulders relaxed during typing, calls, or video conferences. Sit longer, stay supported, and feel the difference in every hour at your desk.
- BREATHABLE MESH THAT WORKS AS HARD AS YOU DO The full-mesh back and seat promote airflow, keeping you cool through long workdays or late-night gaming. Supportive yet breathable, this mesh office chair prevents overheating and delivers consistent comfort all day.
- BUILT STRONG, BUILT QUIET Reinforced metal base and Class 4 SGS-certified gas lift provide stable support up to 300 lbs. Smooth tilt control and quiet casters glide across any floor without noiseideal for shared spaces or late-night work sessions.
- TRUSTED QUALITY & WORRY-FREE SUPPORT Tested to meet SGS and BIFMA standards, the SIHOO B100 ergonomic office chair is built for long-term durability and daily performance. Backed by a 36-month coverage and 30-day easy returns, you can order your desk chair with confidence. Our dedicated support team responds within 24 hours to resolve issuesensuring your experience remains smooth, secure, and stress-free.
Specs 43
| Brand | SIHOO |
|---|---|
| Color | Light White |
| Material | Mesh |
| Product Dimensions | 28.35"D x 28.72"W x 58"H |
| Size | Pack of 1 |
| Brand Name | SIHOO |
| Additional Features | Adjustable Headrest, Adjustable Height, Adjustable Lumbar, Ergonomic, Rolling |
| Unit Count | 1 Count |
| Room Type | Game Recreation Room, Home, Meeting, Office, Studio |
| Age Range Description | Adult |
| Model Name | M18-M160 |
| Surface Recommendation | Hard Floor, Carpet |
| Indoor Outdoor Usage | Indoor |
| Model Number | M18 |
| Number of Packs | 1 |
| Item Highlight | Desk Chair With Adaptive Lumbar Support, Wide Headrest, 360° Rotatable Flip-Up Armrests, Grey |
| Manufacturer | SIHOO |
| Manufacturer Part Number | M18-M160 |
| Number of Items | 1 |
| Material Type | Mesh |
| Frame Material Type | Polypropylene |
| Product Care Instructions | Wipe Clean |
| Seat Material | Mesh |
| Fill Material | Foam |
| Upholstery Fabric Type | Mesh |
| Back Style | Split Back |
| Style Name | Modern |
| Pattern | Solid |
| Finish Types | Polished |
| Shape | L-Shaped |
| Arm Style | 4D Flip-up |
| Leg Style | wheels |
| Form Factor | Recliner |
| Item Dimensions D x W x H | 28.35"D x 28.72"W x 58"H |
| Item Weight | 38.3 pounds |
| Seat Back Interior Height | 21.1 inches |
| Seat Height | 21.85 inches |
| Seat Depth | 17.1 inches |
| Seat Length | 19.7 inches |
| Arm Height | 28.5 inches |
| Item Dimensions | 28.35 x 28.72 x 58 inches |
| Reclining Position Count | 3 |
| Maximum Weight Recommendation | 300 pounds |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Nov 19
Yes, absolutely! This item's return window has been extended for the holiday season: Returnable until Jan 31, 2027.
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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Top Amazon Reviews
Should’ve Switched From Leather Years Ago!
Color: Obsidian
Size: Pack of 1
I’ve always had a leather executive-style chair, but with the Florida heat and some back pain, I decided it was finally time to try something different. I’m really glad I did. The mesh is a huge improvement for keeping cool, and the chair is extremely comfortable even when I’m sitting in it for long periods of time. The back support is excellent and has made a noticeable difference compared with my old chair. Everything feels sturdy and well made, and the adjustments make it easy to get the chair exactly where I want it. Assembly was straightforward and the instructions were easy to follow. I also really like the overall appearance. It has a clean, modern look, the black color goes with everything, and it looks much nicer in person than I expected. After using it, I honestly don’t see myself going back to a traditional leather office chair. Very happy with the quality, comfort, support, and overall design. Easy 5 stars.
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Reviewed in the United States on August 25, 2026 by David Trippe
Comfortable. Great Value for money. Easy to assemble. Great customer service.
Color: Charcoal
Size: Pack of 1
I've been looking for a new chair to replace a cheap $30 chair i bought off of Amazon last year that had been killing my back and shoulders. I wanted something in the $150-$200 range and settled on the M18. Shipping was a fast 3 days with Prime and the box arrived in great condition. All parts were separately wrapped or in their own boxes. Came with all hardware and nothing was missing. Assembly took me a little longer then normal because i have rotator cuff injury in my left shoulder so that arm is mostly useless. The most difficult part for me was attaching the wheels to the base. Other then that it was simple. Once the chair was assembled i sat in it for the first time and started making my adjustments with the recline feature, armrest level along with the headrest. Next i reached around for the lumbar support knob and tried to adjust it but with my bad shoulder i decided to just get out of the seat and turn it around and adjust it with both hands. After spinning the chair a round to get at the lumbar knob i noticed a large crack in the plastic in the middle of the back of the lumbar plastic piece. I had not made any lumbar adjustments yet so i assumed this is how i received it. The lumbar support comes preinstalled to the backrest so it either was damaged before or during the shipping process. Either way it was damaged before being delivered to me. The lumbar support still functioned properly but it was still broken. I decided to contact Sihoo's customer support that came along with the installation instructions regarding the damaged lumbar piece. I received a reply the next day and after sending them some more info about my order and a couple pics they shipped me a replacement part which took a week to arrive. I swapped out the damaged part and after owning the chair for a week so far i am really happy with my purchase. Im about 5'10 180lbs. At its highest height level my feet reach the ground comfortably flat footed. The backrest fully covers my back and the headrest adjusts very well to sit on the back of my lower head/upper neck. The armrests only go up and down....not forward and back or tilt inwards. This is fine for me as they are grooved to fit your forearm while sitting at your desk/keyboard. The armrests are also a soft cushioned rubber material...not a hard plastic. The mesh of the backrest and headrest are good material and seem well made. The seat is very wide and the cushioning is firm which i prefer. Usually more firm cushioning seems to last longer and hold its form. The base of the chair is VERY sturdy and made of all metal. My chair is on carpet and holds its position very well. As far as recline goes you can set it to recline all the way back, half way or lock the chair in the upright position. You can also adjust the resistance on the reclining feature. So that being said im very happy with my purchase. It arrived with a slight flaw which the company corrected in a fast manor and was very polite in their customer support. I personally don't have a lot of experience with many office chairs and have never used a high end chair($500-$1000+) chair before to make any comparisons. All my chairs for the most part have been from local stores like Staples or Office Depot. Id recommend this over anything they carry in this price range....and i went and looked at their products before buying this chair as well.
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Reviewed in the United States on September 1, 2023 by Dre
Comfortable and adjustable!
Color: Charcoal
Size: Pack of 1
One of the most comfortable and tunable chairs I've used. I am 6ft1, 210lbs. I happened to try it out at a friend's house and insisted they send me a link! Finding the instructions in the box was a bit frustrating. They were inside of the plastic covering the seat of the chair, instead of just loosely packed in the box. Having already read complaints about missing instructions, I immediately feared I was one of the victims, until I got half way though the assembly and turned the seat over to notice them stuck in there. I would have searched more diligently if not for the reviews. But it all worked out in the end. This is the first cloth seated office chair I have ever purchased. I wish they had scotchguarded it. Minus 1 star. On day 5, a full cup of coffee was attacked by a large bag of chips and went flying off the table when I had my back turned! You can't make this stuff up! The seat absorbed it like a sponge. I had even thought to Scotchguard it the previous evening, and was too lazy to follow through. So...Scotchguard this ASAP when you get it! The cloth seat is more comfortable than my previous leather and pleather chairs that cost the same or more. Also, I'm not building up as much heat in the seat. The arm rests are not perfect. The adjustment is okay. But there is a sharp edge where the bottom and top half of the outer shell was formed. It can almost cut your hand and detracts from the comfort of the chair when you hit that edge or grip the armrest as you are sitting down or getting up. The armrests seem adequate at present but they are about 35% thinner than the armrests on my old chair, of similar composition. I'm not confident they will hold up and be comfortable over the long term. Another caveat about this type of armrest shell, is that the plastic tends to crack over time from your elbows and arms digging into it, along with body oils that seem to attack the the pleather surface. When that happens, it pinches your arm when used. That was the main reason for replacing my older chair. I hope this one may have some better results. Time will tell. The mesh back is comfortable and allows my skin to breath. I really love being able to adjust the recline position to more than one angle! It's usually all or nothing. The adjustments on the lumbar and headrest are useful and comfortable . The chair doesn't raise up as high as my old chair, but it is adequate, barely. Overall, I would give the chair 4 stars so far and would buy it again. I may try to trim the sharp edge on the armrest. The left one seems to be the real problem. The right armrest seems better formed near the front edge where I notice it most. The right armrest has the sharper edge toward the back where I don't contact it often.
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Reviewed in the United States on May 1, 2023 by Krylos
Good value
Color: Obsidian
Size: Pack of 1
This chair is comfortable. The last office chair I owned, the cushion had began to bottom out so I knew that I wanted to try a mesh chair instead. I was able to snag the B100 at a pretty good deal. Assembly was straight forward and all the nuts and bolts were clearly labeled with the included tools. I'm about 5'6'' at around 200 lbs and I can comfortably sit in this chair for +6 hours. If I really want, I can lean back in the chair and take a small nap in it. The arm rests are solid and I like the back support. I only wish I had gotten the version with the foot rest. Oh well. I recommend this chair to my friends and family and they generally agree with me.
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Reviewed in the United States on August 21, 2026 by Jared
Great chair!!
Color: Light White
Size: Pack of 1
What an outstanding product. Comes well packaged with easy assembly instructions on line. Takes a bit to assemble but in the process you realize how well designed and constructed it is. My last two chairs were over $600 apiece without the removable arms. Very pleased with the purchase!
Reviewed in the United States on October 1, 2026 by Thomas C. Dowlan
Comfortable, Supportive, and a Great Value!
Color: Light Grey
Size: Pack of 1
I am very pleased with the SIHOO B100 Mesh Office Chair. It is comfortable, supportive, and well-designed for long hours at a desk. The breathable mesh helps keep the chair cool, while the ergonomic design provides excellent back support and encourages better posture. It also feels sturdy, adjusts easily, and has a clean, modern appearance. Overall, this chair offers excellent comfort and quality for the price. I highly recommend it!
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Reviewed in the United States on September 1, 2026 by John Hostinsky III
THINK TEN TIMES BEFORE BUYING THIS $300 CHAIR
Color: Light White
Size: Pack of 1
THINK TEN TIMES BEFORE BUYING THIS $300 CHAIR — UNCOMFORTABLE, POORLY DESIGNED, AND EXTREMELY DISAPPOINTING CUSTOMER SERVICE I sincerely regret purchasing this chair. For approximately $300, I expected a comfortable, ergonomic, durable chair suitable for working from home. Instead, I have been left with an uncomfortable product, hours of wasted time, and a frustrating return process that makes resolving the problem even more expensive. I am not someone who complains unnecessarily. I take care of the things I purchase, follow assembly instructions carefully, and make a genuine effort to understand and use all available adjustments before judging a product. But there is a difference between needing time to adjust to a chair and realizing that the chair itself is poorly designed. THE COMFORT AND ERGONOMICS ARE A MAJOR DISAPPOINTMENT. The seat padding, despite appearing adequate in pictures, is not comfortable enough for extended periods of sitting. The adjustable lumbar support is particularly concerning. Rather than providing comfortable support for the natural curve of the spine, the hard plastic support can feel like a rigid block pressing into the wrong area of the lower back. The limited adjustability makes it difficult to find a position that feels natural and supportive. Leg positioning is another problem. Depending on desk height and chair adjustment, the seat can leave the legs poorly supported, creating uncomfortable pressure beneath the thighs. Anyone buying a chair for working from home should pay close attention to seat depth, lumbar positioning, desk height, and foot support,not simply the appearance of the chair or the advertised ergonomic features. The backrest also does not provide the firm, upright support I expected. Even when the reclining mechanism is locked and the adjustment tightened, the backrest may still give way rather than holding a genuinely upright position. This defeats the purpose of buying a chair advertised for proper posture and support. The height adjustment mechanism is another concern. A loose or wobbly handle and inconsistent adjustments are not what I would expect at this price point. No amount of careful adjustment can compensate for components that feel flimsy or fail to hold their position reliably. The armrests are also disappointing in terms of comfort and durability. Hard surfaces are not pleasant for extended use, and concerns about the covering peeling, tearing, or deteriorating over time make the overall quality even harder to justify. For people who work from home, these are not minor inconveniences. A chair is something you may use for five to eight hours a day, even with regular breaks. Comfort, proper support, stability, and durability matter enormously. A chair that requires additional cushions, a separate footrest, and constant adjustments just to make it tolerable is not delivering the ergonomic experience a buyer reasonably expects. THE ASSEMBLY AND RETURN PROCESS MAKE A BAD PURCHASE EVEN WORSE. I spent nearly TWO HOURS assembling this chair, only to discover that it was uncomfortable and unsuitable for my needs. When I contacted the seller, I hoped for a fair and practical resolution. Instead, I was offered just $20–$30 in compensation. For a $300 purchase, that felt like a lowball offer that did not adequately acknowledge the problem. The return process is equally frustrating. There is no convenient door pickup option. I am expected to disassemble the chair, arrange transportation, and potentially spend another $50 just to get it to a UPS drop-off location. This means investing even more time, effort, and money to resolve a disappointing purchase. Why should a customer who has already spent hundreds of dollars on an uncomfortable product have to shoulder such a substantial additional burden just to return it? THE CUSTOMER SERVICE HAS BEEN JUST AS DISAPPOINTING AS THE PRODUCT. A company demonstrates its values when something goes wrong. Good customer service means listening to the customer and offering a reasonable solution. A token compensation offer that does not meaningfully address the inconvenience, combined with a burdensome return process, leaves a very poor impression. I had read similar negative reviews before purchasing and hoped they were exaggerated. Unfortunately, my own experience has made me understand why other customers were unhappy. I genuinely struggle to understand the overwhelmingly positive reviews when the comfort and practical usability have been so disappointing in my experience. At this price, customers should not have to wonder whether they will need to purchase additional cushions, accessories, or an entirely new chair to get the comfort and support they originally paid for. MY ADVICE TO ANYONE CONSIDERING THIS CHAIR: PLEASE THINK TWICE—OR TEN TIMES—BEFORE BUYING IT. Read the negative reviews carefully. Do not be persuaded by attractive product pictures or ergonomic marketing alone. Consider the quality of the lumbar support, seat cushioning, backrest locking mechanism, armrests, height adjustment, and the seller's return policy before committing your money. Your body deserves a chair that provides appropriate support, and your hard-earned money deserves better value. I would much rather invest in a well-built chair that lasts for years than spend hundreds of dollars on one that disappoints and potentially needs replacing far sooner than expected. FINAL VERDICT: I WOULD NOT RECOMMEND THIS CHAIR BASED ON MY EXPERIENCE, AND I WOULD NOT BUY FROM THIS SELLER AGAIN. The uncomfortable design, concerns about build quality, inadequate proposed compensation, and costly, inconvenient return process have made this a thoroughly disappointing purchase. I am posting this review so other buyers can make an informed decision before spending approximately $300 and potentially facing the same frustration. Please do your research, look beyond the five-star ratings, and carefully consider whether this chair is truly worth the money.
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Reviewed in the United States on October 9, 2026 by Shiza Rizwan
A very good chair
Color: Charcoal
Size: Pack of 1
A solid and sturdy chair. Good quality. - Seat: height is adjustable. Thick and comfortable. - Armrests: height is adjustable. - Backseat: it reclines well (pulling the level outwards and adjusting the tension knob). - Lumbar support: height is adjustable. depth can be adjusted also, but limited. - headrest: not good. It pushes too much forwards. You can remove it or modify it. I just unscrewed the headrest and put a piece of wood between the headrest and the seat frame. Now it's much more comfortable.
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Reviewed in the United States on October 12, 2026 by YG