Model: S4

Prodcut Category: Office Work Space

Surface Recommendation: Hard floor, Carpet floor.

Ergonomic Home Office Chair with Adjustable Armrest

MOQ: 50 sets

Supply Capacity: 8000 sets per month

Delivery Time: 7-30 days depends on the order quantity.

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Product Description

Built with premium materials and branded components, model S4 office chairf keep after‑sales quiet. Mid‑range price, volume‑friendly.

Its double‑back design supports your spine, while the headrest, lumbar, and seat adjust in seconds to match bodies from 155–195 cm and 45–150 kg.

Shelf‑ready options: Black or Gray; foam cushion or breathable mesh seat—mix and match by market or season.

Product Dimensions

Model	S4
Frame material	Metal + Reinforced PA & GF Frame
Backrest material	Net
Maximum load	140 kg
Size/weight (box 1)	76 cm x 65 cm x 43 cm / 22.5 kg
Chair Height	121-141 cm
Headrest Size	40 cm width/21 cm height
Seat Size	53 cm width/50 cm length
Headrest Height Adjustment	17 cm
Backrest Height Adjustment	6 cm
Seat Depth Adjustment	4cm
Height Adjustment	8 or 10 cm
Floor to seatbase	47-57 cm
Armrest to Armrest	68cm
Armrest Adjustment	Height adjustment: 9 cm Horizontal distance adjustment: 8 cm Rotation: 270º
Wheel Diamenter	74 cm

Product Segmentation

One seat pan, many body types: 505 mm wide with 510 mm depth, plus a smooth 50 mm seat slide for true sit‑bone alignment.

S4 With Sponge padding seat

55–60 density molded foam, 10 cm thick, soft-springy, and built to resist sagging.

Wrapped in a skin‑friendly, breathable fabric that stays fresh on long days.

S4 with mesh seat

Full mesh for max airflow—elastic, breathable, and great for warm-running users (yes, mesh costs a bit more).

The curved arch blends contour and tension for cool, buoyant support.

Advantages of S4 Ergonomic Adjustment Office Chair

Certified Safety & Quality
Passed BIFMA & EN1335 certified chair parts for reliable, trusted performance.

Ergonomics that actually work
Micro‑adjustable support that meets your body where it is—spine aligned, pressure off, comfort on.

Tailored OEM Solutions
Flexible customization options, let you meet the unique needs of your market.

Standard 3-Year Warranty
Three years of worry-free coverage on chair parts, plus dedicated after-sales support for retailers.

Fast Delivery
Efficient production and logistics mean quick lead times and fast restocking.

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Features

3D headrest

Cantilevered 3D breathable mesh headrest with 6 cm height travel.

Dual joints that pivot 80° for dialed-in neck/head support—drop it to the lowest point and it still catches your shoulders.

Headrest structure

Headrest ajustment

High Mesh Backrest

Double-back design: a broader upper zone for back support plus an independent lumbar below.

But elastic mesh kills the “gap” between lumbar and upper back. The fit is close to that of a single mesh back.

PA66 frame with 5 steps/6 cm height adjustment works with the lumbar to fill your lower-back void.

Headrest structure

Headrest ajustment

Adaptive Lumbar

Wide, one-piece lumbar with ergonomic inner curve supports both lumbar and sacrum.

Three angle settings (≈3 cm horizontal shift) + auto rebound that tracks your spine, whatever your curve or pressure preference.

Adaptive lumbar support

Angle adjustment knob

5D armrest

Standard 5D: 9 cm height range, dual-axis rotation (top 360°, bottom 270°) so your elbows never hover—typing, gaming, or power-napping.

Steel-plated base, nylon arms, oversized soft pads for cushy, planted support.

Armrest adjustment

Armrest

weight-sensing Tilt Mechanism

Gravity-sensing tilt that auto-matches your weight with linear tension—silky, controlled recline. Two levers handle tilt/seat-depth and height. Lock in at 90/100/110/120°.