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Sihoo M18 Pro Ergonomic Office Chair

$369.00 $499.00

118 reviews

Free shipping with delivery in 1-5 days.

Color

Black Mesh

Footrest Option

Without Built-in Footrest With Built-in Footrest

Product variants

Ready to feel the difference? Click Add to Cart now and give your back the support it’s been waiting for.

SIHOO M18 Pro Ergonomic Office Chair — 4D Linked Armrests, High-Back Breathable Mesh, Adaptive Dynamic Lumbar Support

Meet the M18 Pro — fondly dubbed the “Ergonomic Maestro” for its all-round support.

Building on the runaway success of the original M18, this Pro-level upgrade smashes BIFMA standards and integrates seven ergonomic innovations—adaptive self-weight sensing, 4D linked armrests, moth-shaped elastic lumbar support, dual-joint three-section headrest, W-shaped comfort cushion, multi-function reclining pedestal and heavy-duty PA nylon base—into a sleek, breathable mesh frame.

Perfect for:

Home offices & hybrid work setups
High-performance teams & boardrooms
Gamers chasing pro-level ergonomics
Anyone upgrading from the beloved M18 to the ultimate next step

View details

Sihoo M18 Pro Ergonomic Office Chair

Black Mesh / Without Built-in Footrest – Change

Specifications for product Sihoo M18 Pro Ergonomic Office Chair
Specification
Headrest	Dual-joint 3-section tilt & height
Mechanism	Auto-blance mechanism with 3-position lock. Adaptive self-weight sensing
Mesh material	/
Suspension System	/
Waterfall-shapedseat cushion	W-Shaped Seat Cushion
Lumbar support	Four-way adjustability (± 4 cm vertical, ± 2 cm front/back) Elastic, curved design moulds to any body shape for bespoke spine alignment
Armrests	4D Linkage Armrests. Height (7 cm range), width, depth (6 cm forward/back), and rotation adjustments Seamlessly moves with your recline for uninterrupted arm support
Seat height	43 – 53 cm
Seat width	50cm
Seat depth	42 cm
Overall height	Height: 105-131cm Width: 67cm Depth: 72cm
Recline angle	109°, 122°, or 134
Net weight	9.85 kg
Max Recommended Weight	136 kg (300 lb) Gas Lift: Class-3 D85, BIFMA tested
Recommended user height range	150 - 180 cm (5' - 5'11")

Why the M18 Pro?

As Australia’s leading premium office seating solution, the SIHOO M18 Pro combines cutting-edge ergonomics with rock-solid durability. Designed for long days at the desk—whether you’re leading remote teams or powering through your next big project—the M18 Pro keeps you supported, focused and fatigue-free.

*The Footrest is not available in Without Built-in Footrest.

*The Footrest is not available in Without Built-in Footrest.

Specification
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Headrest	Dual-joint 3-section tilt & height	2D headrest Up and down adjustable, rotatable	3D mechanical headrest	Ultra-wide integrated headrest	2D headrest Up and down adjustable, rotatable	—	3D headrest	3D headrest	3D mechanical headrest	—	—	—
Mechanism	Auto-blance mechanism with 3-position lock. Adaptive self-weight sensing	/	Smart weight-sensing mechanism with spring system	Anti-Gravity Mechanism with aerospace-grade glass fiber elastic plates	/	—	/	/	Smart weight-sensing mechanism with spring system	—	—	—
Mesh material	/	Breathable mesh	High-elasticity wave mesh	Italian velvet, DuPont TPEE	Breathable mesh	—	Breathable mesh	Breathable mesh	High-elasticity wave mesh	—	—	—
Suspension System	/	/	/	4 pressure-reducing springs	/	—	/	/	/	—	—	—
Waterfall-shapedseat cushion	W-Shaped Seat Cushion	Soft sponge cushion	Upgraded	Upgraded	Full mesh cushion	—	Full mesh cushion and Soft sponge cushion(90D)	Saddle-shaped cushion	Original	—	—	—
Lumbar support	Four-way adjustability (± 4 cm vertical, ± 2 cm front/back) Elastic, curved design moulds to any body shape for bespoke spine alignment	Manually adjustable 4.8 cm up and down, 3 cm forward and backward	Self-adaptive dynamic lumbar support	Dual dynamic lumbar support with 90°-105° customization	Manually adjustable 4.8 cm up and down, 3 cm forward and backward.	—	Dual lumbar support	4D cushioned lumbar support	Self-adaptive dynamic lumbar support	—	—	—
Armrests	4D Linkage Armrests. Height (7 cm range), width, depth (6 cm forward/back), and rotation adjustments Seamlessly moves with your recline for uninterrupted arm support	Up and down (height adjustable)	6D coordinated	6D coordinated	3D	—	4D	4D	4D coordinated	—	—	—
Seat height	43 – 53 cm	44 - 54 cm (17.32 - 21.26 in)	46.5 - 56 cm (18.31 - 22.05 in)	47-55.5 cm (18.50 -21.85 in)	46 - 55 cm (18.11 - 21.65 in)	—	46 - 55 cm (18.11 - 21.65 in)	47.5 - 57 cm (18.70 - 22.44 in)	47 - 55 cm (18.50 - 21.65 in)	—	—	—
Seat width	50cm	51 cm (20.08 in)	51.5 cm (20.28 in)	51.5 cm (20.28 in)	51 cm (20.08 in)	—	51 cm (20.08 in)	53 cm (20.87 in)	49.5 cm (19.49 in)	—	—	—
Seat depth	42 cm	45.5 cm (17.91 in)	42 - 44.5 cm (16.54 - 17.52 in)	40-47 cm (15.75-18.50 in)	46 cm (18.11 in)	—	46 cm (18.11 in)	44.5 - 49.5 cm (17.52 - 19.49 in)	42.5 cm (16.73 in)	—	—	—
Overall height	Height: 105-131cm Width: 67cm Depth: 72cm	112 - 130 cm (44.09 - 51.18 in)	108 - 128.5 cm (42.52 - 50.59 in)	109.5- 125 cm (43.11- 49.21 in)	107 - 123 cm (42.13 - 48.43 in)	—	107 - 130 cm	116 - 137 cm (45.67 - 53.94 in)	106.5 - 125.5 cm (41.93 - 49.41 in)	—	—	—
Recline angle	109°, 122°, or 134	110°-116°-126°	105°, 120°, 135°	100°,110°,130°	110°-116°-126°	—	110°-116°-126°	0°-9°-18°-27°	110°, 120°, 130°	—	—	—
Net weight	9.85 kg	19.20 kg	23.30 kg (51.36 lb)	26.2 kg (57.75 lb)	20.20 kg (44.53 lb)	—	21.20 kg	22.6 kg	23.20 kg (51.15 lb)	—	—	—
Max Recommended Weight	136 kg (300 lb) Gas Lift: Class-3 D85, BIFMA tested	136 kg (300 lb)	136 kg (300 lb)	136 kg (300 lb)	136 kg (300 lb)	—	136 kg (300 lb)	136 kg (300 lb)	136 kg (300 lb)	—	—	—
Recommended user height range	150 - 180 cm (5' - 5'11")	150 - 180 cm (5' - 5'11")	150 - 190 cm (5' - 6'3")	150 - 190 cm (5' - 6'3")	150 - 180 cm (5' - 5'11")	—	150 - 190 cm (5' - 6'3")	150 - 190 cm (5' - 6'3")	150 - 180 cm (5' - 5'11")	—	—	—