ONEX

ONEX GE300 Breathable Ergonomic Gaming Office Chair

Name: ONEX GE300 Breathable Ergonomic Gaming Office Chair
Rating: 4.94 (17 reviews)

$399.00 AUD

Color Black

Description

The ONEX GE300 Breathable Ergonomic Office Chair is designed to support long hours of focused work with comfort and airflow in mind. Its breathable construction and ergonomic form help reduce heat build-up while promoting healthy posture throughout the day.

Key Features:

Breathable Mesh Back: Encourages continuous airflow to keep you cool during extended sitting.

Ergonomic Seating Structure: Supports the natural curve of the spine for improved posture.

Height & Tilt Adjustability: Allows easy customisation to suit different desk setups.

Supportive Cushioning: Provides balanced comfort for all-day office use.

Sleek Professional Finish: Clean black design suits modern office and home workspaces.

Ideal for professionals and home office users who prioritise breathability and ergonomic support, the gaming office chair is a reliable choice for everyday productivity.

ESIGNED FOR COMFORT & PERFORMANCE

PREMIUM GAMING SEATS ENGINEERED FOR PERFORMANCE.

TWO-DIRECTIONAL HEADREST - ANGLE ADJUSTMENT

Rocking Mechanism - ADJUST THE ANGLE 90 – 135°

ADJUSTABLE SEAT DEPTH - MOVE THE SEAT FORWARD AND BACKWARD

ADJUST SEAT HEIGHT & DEPTH

Use the lever on the left of the chair to move the seat forwards and backwards. Hydraulic gas lift allows for seat height adjustment with a 360-degree swivel

DJUSTABLE LUMBAR SUPPORT

HIGH TENSILE MESH FABRIC

Specifications

Model name	ONEX GE300
Product Code	ONEX-GE300-B, ONEX-GE300-BB, ONEX-GE300-BR, ONEX-GE300-BW, ONEX-GE300-BP, ONEX-GE300-BV, ONEX-GE300-BG
Available colours	Black, Black/Blue, Black/Green, Black/Pink, Black/Red, Black/Violet, Black/White
Weight Capacity	125kg max
Hours of Use	8 hours plus
Warranty	1 year
Overall dimension (WxDxH)	67cm x 68cm x 118–128cm
Foam type	High Density New Cut Foam
Mechanism type	Synchro
Seat Depth Adjustment	Yes
Tilt Tension Control	Yes
Adjustable Armrests	Yes - One Dimensional
Adjustable Back Tilt	90°–135°
Adjustable Chair Tilt	Yes
Lumbar Support	Built in Adjustable
Head Support	Adjustable height and angle
Gas lift class & height	Class 4, 100mm max.
Base size and type	350mm nylon base
Caster size & material	60mm nylon caster
Back and Seat Cover material	High tensile mesh with PVC
Backrest dimension (WxH)	50cm x 76cm
Back Frame type	Nylon
Seat dimension (WxD)	53cm x 51cm
Seat Thickness	10 cm
Armrest Height range	7cm
Armrest materials	PP + PU
Product weight	15.5kg
Package dimensions	73cm x 36cm x 66cm
Package weight	19kg
Assembly time	30min

Refund Policy

We offer a 30-day return policy from the date you receive your item. To be eligible, products must be unused, in original packaging, with tags, and include proof of purchase. For further details, please visit our faq.

Shipping Policy

Orders are processed within 1–3 business days of payment. You will receive a tracking email once your order has been dispatched. We ship Australia-wide using trusted couriers with the following estimated delivery times:

Metro: 3–7 business days
Regional: 5–10 business days
Remote: 7–14 business days (additional fees may apply)

Please note that delivery times are estimates and may vary. Large or heavy items may require pallet freight, in which case someone must be present to sign for the delivery. For further details, please visit our FAQ:

Purchase from one of our authorised retailers

ONEX GE300 Breathable Ergonomic Gaming Office Chair

Black

$399.00 AUD

GX Signature • STC Designer • RTC High-Performance v

ONEX gaming chairs deliver ergonomic comfort, premium finishes, and solid stability. Crafted to elevate every gaming session.

Adaptive Ergonomic Support

Smart shaping that follows your natural posture for long hours of work, play, and daily routines.

High Density  Comfort Foam

Premium cushioning engineered for a balanced feel, supportive where you need it, soft where it matters.

Durable Everyday Construction

Reinforced materials tested to handle real-world use, long sessions, and constant movement.

Smooth, Easy Adjustability

Intuitive recline, height, and seating adjustments designed to match how you move throughout the day.

Comfort Focused Contouring

Thoughtfully shaped back and seat contours that support your body naturally for all-day ease.

Designed for Real People & Spaces

Modern comfort that fits seamlessly into bedrooms, offices, gaming setups, and creative spaces.

Engineered for performance, designed for comfort.

Long-Lasting Comfort

High-density foam made to support long hours of sitting.

Gaming-Grade Materials

High-density foam and performance fabrics for lasting comfort.

Engineered for Reliability

Reinforced frames and smooth mechanisms for consistent support.

C r a f t e d f o r R e a l C o m f o r t , B u i l t f o r R e a l L i f e

5 stars: 16 (94%)
4 stars: 1 (6%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

So comfortable and great quality. Simple to put together

ONEX GE300 Breathable Ergonomic Gaming Chair Black

My back feels so much better after using this gaming chair

ONEX GE300 Breathable Ergonomic Gaming Chair

Comfy enough for long work days.

ONEX GE300 Breathable Ergonomic Gaming Chair Black

Hey, I recently bought the ONEX GE330 for my home gaming setup. I wasn’t sure at first because the product page didn’t mention my exact desk height, but the description had the measurements, so I decided to give it a try. It arrived really fast, around 3 days here in Sydney.

Assembly was super easy and all the parts were included, which was a relief because I’ve had chairs where screws or cushions were missing. The seat and back cushions are really comfy, and the lumbar support hits the right spot. I also like the adjustable armrests and smooth recline. I am satisfied with this.

ONEX GE300 Breathable Ergonomic Gaming Chair Black

Honestly didn’t expect much, but the Onex chair is awesome. Setup was easy, super comfy, recline works great, and my back actually feels supported. Definitely recommend.

ONEX GE300 Breathable Ergonomic Gaming Chair Black

The chair is not like really perfect, but better than expected for under $300.

ONEX GE300 Breathable Ergonomic Gaming Chair Black

My housemate recommended the ONEX GE300 after I complained about my old chair hurting my neck. I checked it out and ordered it. It showed up in good time and was simple to put together. The breathable mesh is awesome, especially while gaming or working long hours. Very comfortable overall.

ONEX GE300 Breathable Ergonomic Gaming Chair Black

I’m pretty tall (around 196 cm) and the Onex GE300 still fits me really well, which was a big surprise. It’s roomy, comfy, and the adjustment range is good. I mostly game but sometimes work at my desk too and this chair has made sitting a lot more comfy. The mesh is great — I don’t get all sweaty like I did with leatherette chairs.

ONEX GE300 Breathable Ergonomic Gaming Chair Black

I was hesitant to spend this much on a chair, but after using it for a month, I can say it was worth every dollar. I play games for 4–5 hours most evenings, and this chair has made a huge difference. My back and neck don’t ache anymore, and the adjustable features make it easy to find the perfect position. Quite love this!

ONEX GE300 Breathable Ergonomic Gaming Chair Black

Bought the GE300 for my home office. Mesh back makes it breathable and the seat is comfortable for long hours. Recline works smooth too. Overall happy with it.

ONEX GE300 Breathable Ergonomic Gaming Chair Black

Really happy with this chair. Can sit for hours without back pain. Looks great and easy to assemble.

ONEX GE300 Breathable Ergonomic Gaming Office Chair

Great value for the price. I spend 8+ hours a day on it, and my back doesn’t hurt like it used to.

ONEX GE300 Breathable Ergonomic Gaming Chair

Very comfy, especially for long working days.

ONEX GE300 Breathable Ergonomic Gaming Office Chair

Very supportive and easy to adjust. Perfect for my home office setup.

ONEX GE300 Breathable Ergonomic Gaming Chair

I’m using this for a mix of WFH and gaming and it’s been a big upgrade. The build feels sturdy, adjustments are smooth, and I can finally get my posture right.

ONEX GE300 Breathable Ergonomic Gaming Chair Black

Love the Onex GE300! Good value and comfy for long hours. My partner steals it now more than I do lol. Assembly was straightforward and the adjustable features make it great whether I’m typing up work or gaming late into the night. Highly recommend especially if you’re on a budget.

ONEX GE300 Breathable Ergonomic Gaming Chair

After a week of use, I’m genuinely impressed. Support in the right places, no weird creaks, and the overall feel is better than what I expected at this price point. Delivery to QLD was faster than I thought.

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ONEX GE300 Breathable Ergonomic Gaming Office Chair

ESIGNED FOR COMFORT & PERFORMANCE

PREMIUM GAMING SEATS ENGINEERED FOR PERFORMANCE.

TWO-DIRECTIONAL HEADREST - ANGLE ADJUSTMENT

Rocking Mechanism - ADJUST THE ANGLE 90 – 135°

ADJUSTABLE SEAT DEPTH - MOVE THE SEAT FORWARD AND BACKWARD

ADJUST SEAT HEIGHT & DEPTH

Use the lever on the left of the chair to move the seat forwards and backwards. Hydraulic gas lift allows for seat height adjustment with a 360-degree swivel

DJUSTABLE LUMBAR SUPPORT

HIGH TENSILE MESH FABRIC

HIGH TENSILE MESH FABRIC

Model name

ONEX GE300

Product Code

ONEX-GE300-B, ONEX-GE300-BB, ONEX-GE300-BR, ONEX-GE300-BW, ONEX-GE300-BP, ONEX-GE300-BV, ONEX-GE300-BG

Available colours

Black, Black/Blue, Black/Green, Black/Pink, Black/Red, Black/Violet, Black/White

Weight Capacity

125kg max

Hours of Use

8 hours plus

Warranty

1 year

Overall dimension (WxDxH)

67cm x 68cm x 118–128cm

Foam type

High Density New Cut Foam

Mechanism type

Synchro

Seat Depth Adjustment

Yes

Tilt Tension Control

Yes

Adjustable Armrests

Yes - One Dimensional

Adjustable Back Tilt

90°–135°

Adjustable Chair Tilt

Yes

Lumbar Support

Built in Adjustable

Head Support

Adjustable height and angle

Gas lift class & height

Class 4, 100mm max.

Base size and type

350mm nylon base

Caster size & material

60mm nylon caster

Back and Seat Cover material

High tensile mesh with PVC

Backrest dimension (WxH)

50cm x 76cm

Back Frame type

Nylon

Seat dimension (WxD)

53cm x 51cm

Seat Thickness

10 cm

Armrest Height range

7cm

Armrest materials

PP + PU

Product weight

15.5kg

Package dimensions

73cm x 36cm x 66cm

Package weight

19kg

Assembly time

30min