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Office Chair, Ergonomic Desk Chair with Adjustable Lumbar Support and Flip up Armrest, Breathable Mesh Computer Chair for Home Office, Black

  • Based on 793 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Mar 21
Order within 22 hours and 10 minutes
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Color: Black


Material Type: Fabric Seat


Features

  • Enhanced Lumbar SupportThis office chair features a large and adjustable lumbar support cushion filled with thick sponge to cradle your lower back and help you maintain a comfortable posture for long hours of work. It also has an S-shaped ergonomic backrest that aligns with your spine and reduces pressure and muscle fatigue.
  • Space SavingThe armrests of this desk chair can be flipped up 90 to fit different needs and save space. You can slide the chair under the desk when not in use. The armrests are contoured to match your arms shape and have soft padding to protect your wrists and elbows. The computer chair can be adjusted in height by 3.74 inches and swivel 360 for convenience.
  • Versatile UseThe rubber mute wheels of this mesh chair roll smoothly and quietly without scratching your wooden floor. You can also recline the chair by pulling out the lever and enjoy a relaxing break from work. This chair is suitable for various settings, such as office, living room, study room, meeting room, etc.
  • Comfortable & SafeMuxx.Stil ergonomic office chair has a U-shaped seat cushion filled with high-density foam that conforms to your body and relieves pressure on your thighs and hips. The seat also has a waterfall edge design that promotes blood circulation in your legs. The breathable nylon mesh material allows air circulation and keeps you cool all day long. Max capacity: 264 lbs.
  • Easy To Assemble & 15-year WarrantyYou can easily set up this mesh chair in 15-20 minutes with the provided instruction manual, video, and tools. All task chairs come with a 15-year warranty, so please feel free to contact us if you have any questions or issues. We will provide you with effective assistance.

Brand: MUXX.STIL


Color: Black


Material: Fabric Seat


Product Dimensions: 20.5"D x 25.6"W x 38.2"H


Size: 20.5"D x 25.6"W x 38.2"H


Brand: MUXX.STIL


Color: Black


Product Dimensions: 20.5"D x 25.6"W x 38.2"H


Size: 20.5"D x 25.6"W x 38.2"H


Back Style: Mesh Back


Special Feature: Flip armrest, Large Adjustable Lumbar Support


Product Care Instructions: Dry Clean


Unit Count: 1.0 Count


Recommended Uses For Product: Gaming, Office, Reading


Maximum Weight Recommendation: 264 Pounds


Style: Modern


Pattern: Solid


Finish Type: Nylon


Room Type: Bedroom, Office, Study Room


Age Range (Description): Adult


Included Components: Assembly Accessories, Installation Manual, Office chair


Shape: Rectangular


Model Name: UMB01BK01


Arm Style: Flip-up armrest


Surface Recommendation: Hard Floor


Seat Back Interior Height: 20.5 Inches


Furniture base movement: Swivel


Indoor/Outdoor Usage: Indoor


Seat Height: 21.6 Inches


Seat Depth: 20.1 inches


Fill Material: Sponge


Cushion Style: Waterfall-Shaped


Seat Length: 19.7 Inches


Leg Style: Tapered Leg


Arm Height: 31.7 Inches


Reclining Position Count: 2 to 5


Tilting: Yes


Is Foldable: No


Chair Backrest Width: 19.3 Inches


UPC: 783970061850


Form Factor: Upholstered


Manufacturer: MUXX.STIL


Assembly Instructions Description: Includes assembly instructions and necessary tools. Follow the provided manual and tools to assemble the chair.


Item Weight: 26.4 pounds


Item model number: UMB01BK01


Date First Available: July 10, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Mar 21

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.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • A Well-Designed and Manufactured Work Chair
Color: Khaki Material Type: Fabric Seat
The assembly directions were clear and accurate. I put the chair together in little more than an hour. As I sit in it, I can say that the adjustments for height, lumbar support, lean, and swivel make it quite comfortable. When the arms are up it fits nicely under the desk. In short, everything I want in a work chair. ... show more
Reviewed in the United States on February 15, 2026 by Amazon Customer

  • Excellent Chair for Comfort and Value
Color: Khaki Material Type: Fabric Seat
This chair has been a great upgrade for my workspace. The lumbar support is adjustable and really helps with posture during long hours. I also appreciate the breathable mesh back, which keeps me cool, and the flip-up armrests that make it easy to tuck the chair under the desk. Assembly was quick, and the chair feels solid and well made. The khaki color adds a nice, modern touch to the room. Overall, it’s comfortable, practical, and well worth the price. ... show more
Reviewed in the United States on September 12, 2025 by Syed Hamza Masood Syed Hamza Masood

  • Stylish, Comfortable, and Perfect for My Workspace
Color: Khaki Material Type: Fabric Seat
I absolutely love this chair! It’s super comfortable and gives great back support for long hours at my desk. The color is gorgeous and adds such a nice touch to my office space. It was easy to put together and feels sturdy and well-made. Definitely worth it if you’re looking for a mix of comfort and style! ... show more
Reviewed in the United States on November 6, 2025 by Steph Steph

  • Stylish, supportive, and perfect!!!
Color: Khaki Material Type: Fabric Seat
I’ve been using this chair and I’m really impressed with the comfort and support it offers. The adjustable lumbar support is a huge plus it helps keep my posture in check during long hours at the desk. The breathable mesh back keeps things cool, and the flip up armrests are super convenient when I want to slide the chair under the desk or just have more space. Assembly was straightforward, and the chair feels sturdy and well built. The khaki color is also a nice touch it gives my workspace a softer, modern vibe. So far, it’s made a big difference in my daily comfort. Great value for the price! ... show more
Reviewed in the United States on April 13, 2025 by Mariana Lopez

  • Great office chair
Color: Khaki Material Type: Fabric Seat
So far it’s comfortable but not so sure about the lumbar support. I haven’t had time to really use it for any length of time. Put it together last night and it was fairly easy. Instructions were clear. I like the khaki color very much. It blends nicely with my office. Another plus is the folding arms so it easily fits under my desk. ... show more
Reviewed in the United States on October 31, 2025 by Jackie A. Cappola

  • Love this chair.
Color: Khaki Material Type: Fabric Seat
I really like this chair. It’s stylish and most of all comfortable. It supports my back and the size of the arm rests are perfect.
Reviewed in the United States on February 15, 2026 by Janice B Cullen

  • Great product
Color: Khaki Material Type: Fabric Seat
Comfortable and sturdy. Adjustable height and perfect width
Reviewed in the United States on February 21, 2026 by Danny K.

  • Nice-ish chair but not what I expected.
Color: Grey Material Type: Fabric Seat
Nice chair basically, good looking, and assembly went well, the wheels roll very nicely, lumbar support is good too, with comfy seat back. However, the "seat cushion" design itself is very odd, because the seat cushion is much thicker at the rear than it is at the front, thus you're constantly slipping off forward, always needing repeatedly to lift up and get back on the seat up further where you belong; while the seat tilt adjustments are of no help with this problem, no matter what setting you will be slipping off forward. The lever for adjusting reclining ability is very cumbersome and awkward to use. The arm rests are ok, comfy, but lack the ability to raise or lower, all you can do if flip it up totally out of your way. I wish I could return and exchange this chair for something better but there is no way this could easily be disassembled and returned in the box that is long since gone. This came in a box really super efficiently and very tightly packed, give them credit and kudos for the great packing design. Maybe, hopefully, the manufacturer has some suggestions for replacement when they see this review. ... show more
Reviewed in the United States on November 7, 2025 by M

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