- Onyx Orthopedic Office Chair | Patented SmartGRID seat | Adjustable Lumbar Support | Ergonomic Sitting Posture | High Back Chair | Work, Home, Study | Free Installation | Black

This office chair I snagged online has been a total game-changer for my workday. Seriously, it's so comfortable, I actually look forward to sitting down at my desk now. The lumbar support is just right, and the adjustable features let me dial in the perfect position. Plus, it looks pretty sharp in my home office setup. Definitely a solid purchase for anyone spending long hours seated.

Product is amazing. Great comfort for the money. Installation was quick and seamless

I’ve been using **The Sleep Company Onyx Orthopedic Office Chair** for a few weeks, and it’s been a great upgrade. The **SmartGRID technology** and **adjustable lumbar support** make long work hours much more comfortable, and the **high backrest** gives good neck and shoulder support. The **upright seating position** takes a little getting used to, but once you adjust, it feels very supportive. The **seat cushion** may seem a bit flimsy at first, yet it’s comfortable even for long sittings. The **armrests could use a bit more cushioning**, though they’re still functional and well-placed. Also, the **free assembly service arranged by Amazon** was smooth and quick. Overall, a **great ergonomic chair** with minor improvements needed but excellent comfort, support, and value for the price!

The chair is great for its fast installation and comfort, allowing you to sit for 2 to 3 hours comfortably before needing to take a break. However, the armrest pads feel a bit hard, and the tilt angle is limited to around 100 degrees. The lumbar support and headrest are fixed, which might not suit everyone’s preference. Considering these limitations, the chair is somewhat costly, but it still offers good basic support and ease of use

The The Sleep Company Onyx Chair delivers a genuinely relaxing seating experience without gimmicks. The standout feature is its lumbar support—firm where it needs to be, contoured enough to keep the lower back naturally aligned during long sitting sessions. It doesn’t collapse over time, which is where most chairs quietly fail. The seat height and overall proportions are properly calibrated. Feet rest flat on the floor, knees stay at a healthy angle, and the desk-to-arm alignment feels natural rather than forced. This matters more than flashy adjustments, and Onyx gets this basic ergonomics right. In daily use, the chair promotes relaxation without encouraging slouching. The backrest supports an upright posture while still feeling comfortable enough for extended work or reading. The cushioning strikes a smart balance—supportive, not sink-in soft—so you don’t feel fatigued after hours of use. Overall, the Onyx Chair is a solid choice if you want calm, supported sitting with dependable lumbar support and correct height geometry. It focuses on fundamentals, and that’s exactly why it works.

I recently purchased the rolling office chair "The Sleep Company SmartGRID Onyx High-Back Chair", and I couldn't be happier with my purchase. This chair has truly elevated my work experience to a whole new level. Firstly, the reclining feature is a game-changer. It allows me to find the perfect angle for my back and helps reduce strain during long hours of sitting. Whether I want to sit upright for focused tasks or lean back for a quick break, this chair offers the versatility I need. The hand rest height adjustment feature is another fantastic addition. It enables me to customize the chair to my liking, ensuring that my arms and shoulders are properly supported. This is crucial for maintaining good posture and preventing discomfort, especially during intense work sessions. The seat height adjustment feature is incredibly useful as well. It provides me with the flexibility to adjust the chair's height to match my desk perfectly. This ensures that my feet are planted firmly on the ground, promoting a healthier sitting position and reducing the risk of strain or fatigue. The chair's metal base is a mark of durability and stability. It not only enhances the chair's overall aesthetic but also adds a level of sturdiness that instills confidence while using it. The wheels glide smoothly, allowing for easy movement around the office without any annoying squeaks or hiccups. One of the standout features of this chair is its high backrest. It provides excellent support for my entire back, from the lumbar region all the way up to the shoulders. The ergonomic design helps me maintain proper spinal alignment, reducing the strain on my back and neck. The added height offers a sense of security and relaxation during those long work sessions. In terms of comfort, this chair truly excels. The padding is plush and supportive, allowing me to sit for extended periods without experiencing discomfort. The breathable fabric keeps me cool, even during the hottest days, preventing any build-up of sweat. Overall, this rolling office chair has exceeded my expectations. With its reclining feature, hand rest height adjustment, seat height adjustment, metal base, and high backrest, it offers the perfect blend of comfort and functionality. Whether you spend hours in front of a computer or have frequent meetings, this chair will undoubtedly enhance your workspace experience. I highly recommend it to anyone seeking a top-notch office chair that prioritizes both ergonomics and style.

Quality of chair is very good. Free installation also went smooth.