ONYX Series, Ergonomic Office Chair

Regular price $99.99
Sale price $99.99 Regular price $189.99
Save $90 (47%)
Color: Gray
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The ONYX ergonomic office chair keeps you comfy and focused with excellent lumbar support, made with airy mesh so you stay cool. Easy on the eyes, great for your back, and friendly to your wallet! A great starter chair that won’t break the bank but will keep on giving with reliable comfort and minimalist good looks.


  • GREAT STYLE: With classic color matching and versatile aesthetics, the ONYX office chair is a stylish addition to any office or workspace.
  • ERGONOMIC: Self-adaptive sponge lumbar support reduces the pressure on the lower back and supports your waist.
  • BREATHABLE MESH: Experience breathable and lasting comfort with the mesh-designed back of the chair. Say goodbye to sweating discomfort, even during the longest workdays.
  • FLIP-UP DESIGN ARMRESTS: Armrests with flip-up design can be neatly tucked under your desk when not in use.
  • SPONGE CUSHION: Soft and comfortable sponge cushion provides you with excellent support when you work.


  • SKU: ERK-OC6
  • Color: Gray, Black
  • Back Style: Solid Back
  • Overall Dimensions: 25.59" D x 25.2" W x 39.37-43.32" H
  • Item Weight: 24.91 lbs.
  • Seat Height: 18.5''-21.46''
  • Seat Depth: 20.67''
  • Seat Width: 20.87''
  • Max. Weight Capacity: 275 lbs.
  • Armrest Type: Flip-up design
  • Pattern: Solid
  • Materials: Nylon
  • Hydraulics Gas Piston: Class 4
  • Box Dimensions: 24.41" L x 11.02" W x 23.23" H
  • Box Weight: 30.53 lbs

Installation Manual


  • Free Shipping & Free Return Shipping (Lower 48 US States Only) We know how important fast and free shipping is to our customers. We provide free shipping on all of our products. (Limited to the lower 48 US states only) Customers in Alaska and Hawaii will be charged additional shipping fees. Please contact the customer service team for a shipping quote at 844-416-2090.
  • Orders typically take 1-2 business days for processing and are shipped from the nearest fulfillment center. Standard shipping varies from 2-7 business days and is not guaranteed. Please note that shipping times are estimates and subject to potential delays beyond our control, such as weather, shipping issues, customs, or inventory shortages.
  • We rely on third-party mail couriers for delivery and do not currently offer expedited or 2-day shipping.
  • Once your order has been processed, we will email you order status updates and your tracking number. You can always access your account online and view your order status and tracking details there.


Return & Refund Policy (U.S. Only)

  • If you are not satisfied with the product, You have 30 days after delivery to return the product in its original condition. Return shipping costs are the responsibility of the customer. Upon return, your merchandise will be inspected and appropriate credits and/or refunds will be issued for the item(s) and any taxes due to be refunded in accordance with state law. A restocking fee will apply.

  • But if you have any concerns and wish to return the product, please reach out to our Customer Care Experts. We offer solutions to help you fix what’s wrong, so you can keep and love the things you buy. Because sometimes no return is the easiest return of all.
  • If the products are damaged/defective upon arrival, please call customer service or contact us via email within 72 hours.
  • Services: Services like assembly and installation, expedited shipping (i.e. next day or 2nd-day shipping), and extended warranty are non-refundable.
  • Note: We only accept returns if they are purchased directly from us on eurekaergonomic.com and flagship stores established in online marketplaces that are registered under the name of an Eureka Ergonomic entity. Please contact the relevant distributor if otherwise.
  • For other details about exceptions to our return policy, please check THIS LINK. https://eurekaergonomic.com/pages/returns-refunds
Free shipping On All Orders
30 Day Return Policy Easy Returns and Refunds
Warranty Safe and Secure
ONYX Series, Office Chair,,Adjustable Lumbar Support,Gray
Regular price $99.99
Sale price $99.99 Regular price $189.99

Ergonomic Design

This chair is meticulously designed with ergonomic principles in mind to provide optimal comfort and effectively reduce lower back and lumbar pain.

High-Elastic Mesh Chair

The highly elastic, specialized mesh fabric offers superior breathability and lasting comfort, even during extended periods of sitting.

Adjustable Sponge Lumbar Support Provides Better Protection for Your Lumbar Spine

Soft sponge lumbar support conforms closely to your body, offering comfortable decompression to safeguard your spinal health.

Flip-up Armrests: a Space-Saving Solution

Adjust it up or down to cater to different preferences, offering comfortable arm support.

Powder-Free Sponge Reinforcement for Enhanced Comfort

The seat cushion utilizes a powder-free sponge, free from impurities. It maintains its shape even during extended use, ensuring superior resilience for added comfort.

Height Adjustable for Different Body Heights

Effortlessly adjust the height to ensure comfortable seating for both adults and children.

BIFMA Certified

This product meets BIFMA testing standards, ensuring reliable quality and making it your top choice for office chairs.


Customer Reviews

Based on 18 reviews
Maia C
comfy, wide seat

This is the most well made, comfortable, ergonomic, AND affordable office chair on the market!! I searched high and low until I finally stumbled across this chair and really had my Eureka moment!


This chair is so comfortable and it only took me 30 minutes to build it! I love the lumbar support. My family keeps telling me how much they like this chair!


pretty good chair for the price


Very comfortable sleek, and clean looking on white color theme pc. The ergonomic features does stands out due to the comfortability and sleekness of the chair

Carol Madruga
Love it

It's comfortable, it's supportit rolls easily, the color is fine.
I think it was a good value for my money And I put it together myself in less than an hour I would buy it again.