Flex Ergonomic Home Office Chair

Regular price $249.99
Sale price $249.99 Regular price $439.99
Save $190 (43%)
Color: Off-White
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Meet the Flex, an ergonomic office chair in a league of its own. Its unparalleled lumbar support stems from an innovative dual backrest design, ensuring an unprecedented level of comfort and support.


  • Adaptive Double Back Design: Ideal for those in long-term sedentary office roles and gamers, the clearance spine disperses pressure, and the seat back can be tilted left and right to different positions.
  • Adjustable Backrest: The double-leaf back frame can be adjusted up and down to fit the curve of the spine, fully support the back, and make sitting more comfortable.
  • Synchronous Reclining Seat Back: Adjust the backrest to three positions—90°, 110°, and 135°—using the toggle lever. Shift your body weight to achieve the desired seat inclination, allowing you to find your most comfortable sitting position.
  • Double-Back Technology: Optimal protection comes from alignment with the physiological curve of the human body. Regardless of your posture adjustments, the back support consistently guides you back to the correct alignment.
  • Contact Us: Please feel free to contact us with any questions. Our local customer support team is always there to offer timely help.


  • SKU: ERK-OC10
  • Style/Type: Ergonomic Office Chair
  • Color: Off-White/Dark Gray
  • General Dimensions: 27.56" D x 24.80" W x 44.09-49.60" H
  • Item Weight: 35.93 lbs.
  • Seat Height: 16.92-20.86"
  • Seat Depth: 16.92"
  • Seat Width: 19.69"
  • Max Weight Capacity: 275 lbs.
  • Armrest Type: 3D Armrest
  • Hydraulics Gas Piston: Class 4
  • Material: Sponge, Cotton Fabric, Iron
  • Box Dimensions: 26.77" L x 18.90" W x 24.80" H
  • Box Weight: 41.45 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
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Flex Ergonomic Home Office Chair,Adaptive Double Back Design,Off-White
Regular price $249.99
Sale price $249.99 Regular price $439.99

Are You Experiencing Lower Back Pain?

Double-back chairs are designed to alleviate discomfort. An ergonomic chair relieves back pain, eases the discomfort of prolonged sitting, and maintains a productive working posture.

German Innovation. Dual-Back Technology.

Conceived by German physicist Dr. Brunig, the dual-back ergonomic concept is regarded as a historic "chair revolution." Biomorphic dual-back design ensures a consistent healthy posture, alleviating discomfort and pain.

+1 Backrest, +N Comfort

The backrest moves with you! It’s like having two hands supporting your back at all times, guiding you to assume a correct posture.

Ergonomic Design, Care For The Spine

The chair body incorporates an ergonomic design, ensuring a more tailored fit to the human spine and alleviating pressure on the lower back.

Saddle-Shaped Seat Cushion

Prevents thigh compression and numbness during extended sitting periods by utilizing a saddle-shaped ergonomic design. Conforms to various body types, providing a snug fit for the hips and legs, reducing leg pressure, and ensuring long-lasting comfort.

Backrest and Seat Cushion Thickened With High-Elastic Sponge Filling

Enjoy a comfortable and soft sensation.

Highly Elastic Woven Mesh Fabric. Aesthetics Meet Comfort.

Made from high-elastic woven fabric, this material provides a velvety touch akin to the feel of skin. Through a distinctive weaving technique, it achieves a harmonious blend of elasticity, softness, and durability.

Adjustable Backrest Height

Four adjustable height positions with a 1.57" range, each level offering a 0.39" adjustment, catering to individuals of different heights and body types.

Adjustable Headrest

The headrest is height-adjustable with a 0.39" range, and its angle can be adjusted up to 35°. It aids in maintaining the correct posture and reducing neck fatigue.

3D Armrests - Multi-directional Adjustment

3D multi-angle adjustment accommodates different heights, providing comfortable arm support.

90-135° Rocking Recline

With three locking positions at 90°, 110°, and 135°, the double backrest design ensures that pressure is evenly distributed on the back, protecting the spine from stress and enhancing your comfort while reclining.

Exceptional Quality

Made of High-Quality Materials


Customer Reviews

Based on 17 reviews
Roger F
The Flex

Most comfortable chair ever. It really helps with posture and now my back pain is gone. I’m really happy with this purchase.

Donna Stading-Smith
Totally Satisfied Highly Recommend

This chair offers Lumbar support at exact location needed. Customer Support is Outstanding!! Highly Recommend this Chair & Store. Donna S-S

vanddn patel

good nice chair. recomend

Excellent lumbar support

Having to sit in front of a computer all day, I've had a difficult time finding a good chair that doesn't aggravate my bad back. It wasn't until I bought this chair that I noticed it has excellent back support. The lumbar support fits nicely and provides a nice firm support.

Thanks for the feedback, Bryce! Great to hear the chair's been a game-changer for your back! Glad it's providing the comfort and support you needed. Enjoy!

Shirt Johnson
Great Support, Good Height

I spend most of my waking hours in front of a computer screen. this chair allows my shoulders to have extremely free range of motion. The backrest on this chair also causes me to slouch less, which leads to less back pain. I would 100% recommend this chair if you have health issues that relate to sitting all day.

Thanks for sharing, Shirt! We're glad you found the one! Sounds like the chair's made a big difference for your posture and comfort during long hours. Appreciate the recommendation!