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SIHOO · Office Chairs

SIHOO B300 Pro

SIHOO · Brand founded 2011 · Shenzhen, China

People who want an adjustable lumbar pad, a height-adjustable backrest and an adjustable seat depth at a mid-range SIHOO list price.

$329.99 – $379.99

  • Headrest: 3D Ultra-Wide Headrest
  • Up to 330 lb
  • 3-year warranty
Check price on Amazon

Summary

A mid-priced SIHOO mesh chair with a movable lumbar pad, 6D arms and a weight-adaptive recline.

Best for

  • People who want to set lumbar height and depth; the pad moves 2" up and down and 0.8" in depth.
  • Those who do not want to set recline tension; SIHOO says it adapts to your weight.
  • Users up to 330 lb, SIHOO's stated maximum load.

Good to check first

  • The recline locks at 105°, 120° or 135°.
  • Seat depth adjusts from 16.5" to 18.5"; check it against your thigh length.
  • Returns need the chair unused and in its original packaging, so keep the box until you are sure.

The trade-off

More lumbar, arm and headrest adjustment than SIHOO's budget chairs, still with an all-mesh seat.

Value check

Lists at $329.99 to $379.99 at SIHOO's US store, depending on colour and footrest; it is often on sale for less.

Price
$329.99 – $379.99
Load capacity
330 lb
Warranty
3 years

What SIHOO highlights

  • 4D Micro-Fit lumbar

    The lumbar pad moves with your back and adjusts 2" in height and 0.8" in depth.

  • Weight-adaptive recline

    The recline resistance sets itself to your weight. SIHOO says there are no knobs to set up.

  • 6D armrests

    The armrests rotate, adjust, flip up and move as you recline.

  • 3D headrest and FlexWeave mesh

    A wide adjustable headrest tops a breathable mesh back. SIHOO says the mesh flexes with your body.

As described by SIHOO on its official pages; not a Chairpedia assessment.

Before you buy

Fit (official)

  • Rated to 330 lb.
  • Seat depth 16.5"–18.5"; seat width 19.1".
  • Back height adjusts by 2.2".

Delivery and setup

  • Net weight 43.7 lb.
  • 3-year warranty.

Returns (official policy)

  • SIHOO store: 30-day returns from delivery, return shipping free.
  • The chair must be unused and in its original packaging.

Sources: SIHOO US official store, B300 Pro ↗ (checked Oct 12, 2026) · SIHOO refund policy ↗ (checked Oct 11, 2026)

Check price on Amazon

Specs

Size and fit
Seat height
46.8–55.3 cm
Seat depth
16.5–18.5 in (42–47 cm)
Seat width
19.1 in (48.5 cm)
Back height
2.2 in
Load capacity
330 lb (150 kg)
Adjustments
Recline
Three lockable recline angles: 105°, 120°, 135°
Arms
6D All-Around Armrests (rotate, adjust, flip up)
Lumbar support
4D MicroFit Lumbar Support: 0.8" depth and 2" height adjustment
Headrest
3D Ultra-Wide Headrest
Build and warranty
Warranty
3-Year Free Warranty
Chair weight
43.7 lb (19.8 kg)
Made in
China (Foshan); SIHOO states this for all its products

About SIHOO

Founded
2011
Based in
Shenzhen, China
Manufacturing
Foshan, China

SIHOO launched its brand in 2011 and opened an ergonomics museum in 2012. It set up dedicated research facilities in 2016, according to its own timeline.

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Questions

How much does the SIHOO B300 Pro cost?

It costs $329.99 – $379.99 at the SIHOO US Official Store (Standard Version (Black $329.99, White $339.99) and Footrest Version (Black $369.99, White $379.99) (list = the store's compare-at price; on 2026-10-09 the store showed $259.99-$299.99)), checked Oct 2026.

What is the SIHOO B300 Pro's weight capacity?

It is rated for 330 lb for the B300 Pro (US official Tech Specs), according to SIHOO's official specifications.

Does the SIHOO B300 Pro have a headrest?

Yes. The official specifications list: 3D Ultra-Wide Headrest.

Where can I buy the SIHOO B300 Pro?

You can buy it from Amazon. Check the configuration, price and return terms before ordering.

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Where to buy

Amazon returns are typically 30 days of delivery but set per listing — check before ordering. Some links are affiliate links; Chairpedia may earn a commission at no extra cost to you (disclosure).

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Specs and prices come from the brand sources listed under Specs and next to the price; User Insights link to their originals. Confirm the exact configuration, seller and price before buying. Editorial policy

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