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Haworth

Haworth Soji Office Chair with Ergonomic Adjustments and Lumbar Support, Adjustable Desk Computer Chair with Flexible Mesh Back for Home Office Furniture, Carbon

Excellent

Mesh back
4D arms
Adjustable lumbar
350 lb capacity
Seat depth adjustment

$595.00

In stock on Amazon.com

Specs verified August 2026

Amazon.com data updated October 13, 2026, 2:34 pm ET. Price and availability are accurate as of the time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply.

Ergo Score Breakdown

Ergo Score: 57/100

Adjustability 21/40

Armrests10/104D armrests: 10/10

Seat height0/6Not listed by the seller

Seat depth5/5seat depth adjustment: 5/5

Lumbar adjustment3/7lumbar adjustments: 3/7

Recline0/2Not listed by the seller

Tilt lock0/3Not listed by the seller

Tilt tension3/3tilt tension: 3/3

Advanced tilt0/4Not listed by the seller

Support 16/30

Lumbar support12/12lumbar support: 12/12

Upper back support0/4Not listed by the seller

Headrest adjustment0/2Not listed by the seller

Cushion0/5Not listed by the seller

Seat edge0/3Not listed by the seller

Breathable back4/4mesh back: 4/4

Build 20/30

Warranty9/912-year warranty: 9/9

Weight capacity6/6350 lb capacity: 6/6

Certifications5/5BIFMA, GREENGUARD: 5/5

Base0/3plastic base: 0/3

Gas lift0/2Not listed by the seller

Owner rating0/5Not listed by the seller

Comfort Index

Comfort Index: 32/100

Seat cushionNot listed by the seller

Cushion thicknessNot listed by the seller

ReclineNot listed by the seller

Breathable back15/15

HeadrestNot listed by the seller

Armrests10/10

Owner rating7/25

Specifications

Seat height range	Not listed by the seller
Seat width	Not listed by the seller
Seat depth	Not listed by the seller
Seat depth adjustable	Yes
Seat cushion	Not listed by the seller
Cushion thickness	Not listed by the seller
Back material	Mesh
Backrest height	Not listed by the seller
Backrest width	Not listed by the seller
Armrests	4D adjustable
Lumbar support	Yes
Lumbar adjustments	Height
Headrest	Not listed by the seller
Max recline	Not listed by the seller
Tilt mechanism	Not listed by the seller
Base material	Plastic
Casters	Hard floor
Gas lift	Not listed by the seller
Weight capacity	350 lb
Chair weight	Not listed by the seller
Overall height	39 to 44 in
Warranty	12 years
Certifications	BIFMA, GREENGUARD

Mesh back and seatTilt tension controlSeat depth adjustmentGREENGUARDBIFMA certified

What We Like

It has the highest Ergo Score in its category, helped by adjustable tilt tension, seat depth and lumbar height.
The 12-year warranty is one of the longer warranty terms in its category.
Both the back and the seat are mesh, and the listing names BIFMA and GREENGUARD certifications.

Watch Out For

Its 4.1 average over 98 reviews sits in the lower half of ratings in its category, so the owner feedback is a mixed signal.
The listing does not state whether the chair has a headrest, or its recline angle or seat dimensions.

At a Glance

Adjustable tilt tension, seat depth and lumbar height, a 12-year warranty and the highest Ergo Score in its category: the Haworth Soji is a mesh chair rated for 350 lb with four-way arms and 98 reviews averaging 4.1.

Who This Chair Is For

People who like to re-tune a chair: tilt resistance, seat depth and lumbar height all move.
Buyers who put long coverage first, with 12 years listed.

Who Should Look Elsewhere

Anyone who wants a headrest included, since the listing does not state one.
Sitters who need a rating above 350 lb; the Humanscale Diffrient World states 400 lb.

Setting up the Soji: tension, depth and height

The listing marks tilt tension and seat depth as adjustable, and the lumbar as adjustable in height. The armrests are listed as four-way adjustable, and both the back and the seat are mesh. The recline angle, the tilt mechanism name and lumbar depth adjustment are not stated.