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Flex, Dual-Backrests Ergonomic Office Chair

$269.99
$269.99
Color: Light-Gray
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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.

Features

  • 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.

Specification

  • 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: Fabric
  • Box Dimensions: 26.77" L x 18.90" W x 20.87" H
  • Box Weight: 41.45 lbs.
  • Recommended height：5‘1‘’-6’1‘’

Shipping

  • Free Shipping (Lower 48 US States Only)
    We work with multiple third-party delivery partners for delivery and do not currently offer expedited or 2-day shipping. We have two default delivery services, limited to the lower 48 US states only. large item(s) is typically delivered via LTL freight shipping, and general item(s) is delivered via FedEx/UPS. It cannot be delivered to rural routes, Hawaii, Alaska, APO/FPO addresses, or P.O. boxes. Customers in such areas will be charged additional shipping fees. Please consult customer service for shipping quotes.
  • FedEx/UPS will dropped off the item(s) in front of the first ground-level entryway outside your home (front door, porch, or garage). Transit time for free standard shipping varies from 2-7 business days and is not guaranteed.
  • Free LTL freight delivery is Curbside Drop-Off, transit time for free standard shipping varies from 7-18 business days and is not guaranteed. Deliveries are not typically made at weekends or on holidays. The carrier will unload the item(s) to the ground for you at the loading area or in front of the building/house at the curb. This service does not include unpacking, assembly, or garbage removal. Due to the large volume and weight of the product, you may need some assistance from a family member or friend for the removal of the item(s) from the curbside to your house.
  • Paid upgrade services: We can provide upgrade services, including white gloves or other delivery services, if upgrading services it may cause extra charges. And for more detail please contact our customer service.
  • 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.

Installation Manual

Free shipping On All Orders
30 Day Return Policy Easy Returns and Refunds
Warranty Safe and Secure
Expert Service 24/7 Friendly Support Team
Flex Ergonomic Home Office Chair，Adaptive Double Back Design, Off-White
$269.99
$269.99

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

Dimensions

Customer Reviews

Based on 27 reviews
81%
(22)
11%
(3)
4%
(1)
4%
(1)
0%
(0)
N
Nancy Le
Just okay

The chair is just okay , not my best purchase. I paid around $300 for a chair , I wanted to return it but I have to pay for shipping charge , so I didn't return it because I think the ship charge will probably around $80-$100. If the return is free , I probably return the chair

Dear LeNancy,

Thank you for sharing your feedback with us.

We’re sorry to hear that the chair didn’t fully meet your expectations. We understand how frustrating it can be when a return isn't as simple or cost-effective as you'd hoped. Your experience matters to us, and we appreciate your honest input—it helps us improve both our products and services.

Thank you again for your time and feedback.

Best regards,
The Eureka Ergonomic Team

G
Glen Rosales
The height-adjustable backrest is a nice touch

I bought this model to put in my wife and I's study room. Because we have different body shapes, the chairs I bought before were not suitable for my wife. The backrest of this model can be adjusted up and down. Haha, it was well praised by my wife.

C
Catherine Stuart
Satisfactory choice

This office chair has all the functions I need, and it also has different color options, which is great.

M
Mitchell Herring
I like the adjustable headrest

Long shifts take a toll on my neck. The headrest on this chair tilts exactly where I need it, which is great

V
Virginia Phelps
Ordered for the appearance

I placed the order because of its appearance at first. After it arrived, the overall sitting feeling and comfort were very good. To be honest, this was a bit beyond my expectations. The overall shopping experience was very good

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