Dynamic Lumbar Support
The adaptive lumbar system moves with your posture, helping support the natural curve of your lower back as you sit, shift, and recline.
Dynamic Lumbar
Adaptive lower-back support
2.0" Seat Depth
Sliding seat adjustment
135° Recline
3-position recline lock
360° Armrests
Multi-angle arm support
Pull-Out Footrest
Built for relaxed breaks
Breathable Mesh
Cool, airy sitting comfort
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OTO Zenpex Ergonomic Office Chair
Sale price$299.00Regular price
$399.00-$100.00
- Dynamic dual lumbar support for all-day lower-back comfort
- 1.96" adjustable seat depth fits different sitting postures
- Breathable mesh seat and back keep airflow moving
- 135° recline, pull-out footrest, and 360° adjustable armrests
- BIFMA X5.1 tested with SGS Class-4 gas lift and 3-year warranty
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Dynamic Lumbar
Adaptive lower-back support
2.0" Seat Depth
Sliding seat adjustment
135° Recline
3-position recline lock
360° Armrests
Multi-angle arm support
Pull-Out Footrest
Built for relaxed breaks
Breathable Mesh
Cool, airy sitting comfort
In stock, ready to ship
In stock! Ships within 1-2 business days.
30-day risk-free trial
3-Year Warranty
Complimentary shipping & returns
OTO Zenpex Ergonomic Office Chair
Sale price$299.00Regular price
$399.00-$100.00
Creator Reviews
Real Setups. Real Comfort. Real Reviews.
See how creators, professionals, and home office users experience OTO ergonomic support in real daily workspaces.
Engineered for All-Day Comfort
Every adjustment is designed to help your body stay supported, focused, and comfortable.
Dynamic Support Where Your Back Needs It Most
Zenpex is designed to support the natural curve of your spine with a responsive lumbar system that moves with you. Whether you’re sitting upright, leaning back, or shifting through the day, the backrest helps keep your lower back supported without feeling rigid.
Built for long work sessions, study hours, and everyday use, it delivers targeted lower-back support that helps reduce pressure and encourages a more balanced sitting posture.
Adjust Your Seat. Recline Your Way.
From focused work to relaxed breaks, Zenpex gives you the flexibility to sit the way your body needs. The adjustable seat depth helps create a better fit for different leg lengths, while the three-position recline lets you shift from upright support to a more relaxed angle.
When it’s time to pause, the pull-out footrest adds another layer of comfort—making it easy to stretch out, lean back, and reset. With adjustable seat depth, multi-angle recline, and an integrated footrest, Zenpex adapts to more moments throughout your day.
Slide to see how Zenpex supports you through work, breaks, and everything in between.
From Focus Mode to Relax Mode
Engineered Comfort, Adjusted to You
From breathable mesh to adaptive lumbar support, every detail is designed to help your body stay supported through long hours of work, focus, and rest.
Durability Tested. BIFMA Standard Ready.
Zenpex is tested against demanding durability and stability standards, including seat, armrest, footrest, tilt mechanism, structural, and base load performance. Built with a stable frame and certified components, it's designed for confident everyday use.
Seat Durability Cycles
Armrest Durability Tests
Tilt Mechanism Tests
Footrest Durability Tests
Free shipping and returns
Technical Specifications
Built to Fit the Way You Sit
Explore Zenpex dimensions, adjustability, materials, and package details in one clear view.
41.7"–51.2" H
Adjusts to different desk setups
3-position recline lock
Designed for everyday support
Zenpex Ergonomic Chair
A breathable mesh ergonomic chair with adaptive lumbar support, adjustable seat depth, multi-angle recline, and an integrated footrest.
SKU
ZP-01
Product Dimensions
28.3" W × 29.5" D × 41.7"–51.2" H
Package Dimensions
30.7" × 26.8" × 15.0"
Net Weight
40.1 lbs
Gross Weight
48.5 lbs
Standard
BIFMA X5.1-2017
Dimensions
Overall Height41.7"–51.2" / 106–130 cm
Overall Width28.3" / 72 cm
Overall Depth29.5" / 75 cm
Seat Height17.3"–20.3" / 44–51.5 cm
Seat Width20.1" / 51 cm
Seat Depth16.5"–18.5" / 42–47 cm
Seat Depth Adjustment2.0" / 5 cm
Backrest Width20.1" / 51 cm
Backrest Height21.7" / 55 cm
Armrest Height8.3"–10.8" / 21–27.5 cm
Footrest Width15.7" / 40 cm
Footrest Extension10.3" / 262 mm
Adjustability
HeadrestHeight and angle adjustable
Headrest Travel2.0" / 5 cm
Headrest RotationLarge-axis 70°, small-axis 50°
Backrest Height4-position height adjustment
Lumbar SupportAdaptive dual-zone lumbar support
ArmrestsHeight, front-back, and 360° pad rotation
Armrest Height Adjustment2.6" / 6.5 cm
Armrest Front-Back Adjustment2.8" / 7 cm
Seat Depth5-position sliding adjustment
Recline3-position recline lock, up to 135°
Chair Rotation360° swivel
FootrestPull-out and flip-up design
Materials & Components
MeshWintex M350 breathable mesh
HeadrestMesh, PA+GF support, aluminum alloy support
BackrestMesh, PP+GF frame, aluminum alloy support
Lumbar SupportMesh with PP+GF outer frame
ArmrestsPA+GF structure with PU arm pads
SeatMesh with PA+GF seat frame
Gas LiftClass-4 gas lift
BasePolished aluminum alloy base
Casters60 mm PU quiet casters
Package Includes
Headrest1
Backrest1
Seat Cushion1
Lumbar Support1
Gas Lift1
Chair Base1
Casters5
Left Armrest1
Right Armrest1
Hardware Kit1
T-Wrench1
L-Wrench1
FAQs
Is this chair suitable for tall users over 6 feet?
Yes. The chair is designed to accommodate users ranging from 5'0" to 6'3". It features a 1.96" adjustable seat depth to provide full thigh support for taller individuals and a high-range adjustable headrest to ensure proper neck alignment.
How does the "Dynamic Lumbar Support" work?
The OTO Zenpex features a dual dynamic lumbar system that automatically adapts to your posture and the natural curve of your spine. This provides continuous lower back support and reduces pressure during long hours of sitting.
What are the primary materials used in the construction?
The chair utilizes high-elastic, breathable mesh for the backrest and seat to ensure optimal airflow. While the frame and 3D armrests are primarily made of durable nylon and plastic, it features a SGS Class-4 gas lift and a sturdy base capable of supporting up to 300 lbs.
Can I tilt the chair back for a nap?
Absolutely. The backrest offers a 135° recline capability. Combined with the extensible footrest, you can easily transition from a focused upright work posture to a relaxed position for resting or gaming.
What kind of warranty coverage does OTO provide?
The chair comes with a 3-year warranty starting from the date of purchase. This covers functional defects and parts replacement, backed by a dedicated support team to assist with any ownership issues.