SIHOO · Office Chairs

SIHOO B100 Pro

SIHOO · Brand founded 2011 · Shenzhen, China

People who want flip-up 4D arms, a wide headrest and an optional footrest in a low-priced SIHOO mesh chair.

$259.99 – $299.99

  • Headrest: Wide 3D adjustable headrest
  • Up to 330 lb
  • 3-year warranty
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Check price at SIHOO ↗

Summary

A low-priced SIHOO with flip-up arms and a three-position recline to 135°.

Best for

  • Budget buyers who want flip-up arms to slide under the desk.
  • People who like to recline; it locks at three positions up to 135°.

Good to check first

  • SIHOO's US page lists no user height range, so compare the official seat dimensions with your build.
  • Returns need the chair unused and in its original packaging, so keep the box until you are sure.

The trade-off

Many features for the price, with little user evidence collected so far.

Value check

Lists from $259.99 in the US, about half the C300 Pro V2's list price.

Price
$259.99 – $299.99
Load capacity
330 lb
Warranty
3 years

What SIHOO highlights

  • Lower-back and sacral support

    A floating sacral cushion sits low on the backrest. SIHOO says the support starts lower than before.

  • Mesh waterfall seat

    The mesh seat has a sloped front edge. SIHOO describes it as breathable with better leg support.

  • Wide 3D headrest

    The wide headrest adjusts in three directions for head and neck positioning.

  • 4D flip-up armrests

    The arms adjust in several directions and flip up. SIHOO says this saves space under desks.

  • Three recline positions

    The back locks at three positions up to 135°. SIHOO presents this as a way to shift posture through the day.

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

What users say

What users love

  • Recline and footrest for resting

    Users like that it reclines far, locks at an angle and pairs with the footrest for a break.

  • Long sessions, less ache

    Users who game or work long hours say their back no longer aches at the end of the day.

  • Flip-up arms

    Users praise armrests that adjust and lift out of the way.

  • Breathable seat

    Users in hot weather find the mesh comfortable.

  • Sturdy feel

    Users say the chair feels solid once built.

Across SIHOO's mesh lineup

Shared reviews for the M57, M18 and B100 Pro; praise not tied to one model.

  • Comfortable desk hours

    Across SIHOO's mesh lineup, users praise chairs that stay comfortable through long work and gaming days.

  • Cooler than leather

    Users moving from leather or gaming chairs say the mesh back keeps them noticeably cooler.

  • Sturdy for the price

    Users call the frames solid and well made, and often say the chair beats others in its price range.

  • Straightforward setup

    Users say assembly takes well under an hour with labelled parts.

  • Quick replacement parts

    Users report missing or damaged parts sent within about a week.

Most-mentioned topics

  1. 1. Mesh seat5 owners · 60% positive
  2. 2. Lumbar support5 owners · 40% positive
  3. 3. Recline and lock4 owners · 75% positive
  4. 4. Armrests4 owners · 75% positive
  5. 5. Build and assembly3 owners · 67% positive

What users repeat

  • Users like that the recline locks at an angle and pairs with the footrest for resting.
  • Lumbar support splits users: some find it fine, others barely notice it.

Good to know

  • Tip: if you sit upright all day, compare the lumbar with other chairs; some users barely feel it.
  • Tip: check every screw seats fully during assembly; one user had two that stopped halfway.
  • Tip: the mesh seat is firm; a few users prefer a cushion for long sits.

Summarised in our own words from 7 user reports in online user discussions (2026). Each user is counted once; sale and promotional posts, repeats and other models are left out.

More details →

Where users disagree

  • Lumbar support

    One side: Some users find it comfortable for long gaming or work sessions.

    Other side: Others say they barely feel it, or that it is average at best.

Topic notes

  • Mesh seat: Breathable and fine in hot weather for most; one user finds it firm over long sits and one says the seat front tilts up.
  • Lumbar support: Some users are happy with it; others barely feel it or call it average.
  • Recline and lock: Users like that it reclines far and locks at an angle; one says the recline is noisy.
  • Armrests: Flip-up, adjustable armrests are liked; one user would prefer simple up-and-down height.
  • Build and assembly: Feels sturdy to two users; one had screws that would not seat fully during assembly.

After long-term use

Not enough long-term user data yet.

Before you buy

Fit (official)

  • Rated to 330 lb.
  • Seat height 18.3–21.9 in (UK and EU stores).

Delivery and setup

  • Net weight 36.4 lb.

Returns (official policy)

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

Users suggest checking

  • Users mostly bought it for the recline and footrest; if you sit upright all day, compare the lumbar design with other chairs first.

Sources: SIHOO US official store ↗ (checked Oct 10, 2026) · SIHOO refund policy ↗ (checked Oct 10, 2026)

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Specs

Size and fit
Sizes
44.1–51.6 in
Load capacity
330 lb (150 kg)
Adjustments
Recline
3-position recline up to 135°
Arms
Enlarged 4D flip-up armrests
Lumbar support
Responsive lower-back support
Headrest
Wide 3D adjustable headrest
Build and warranty
Warranty
3 years
Chair weight
36.4 lb (16.5 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 B100 Pro cost?

It costs $259.99 – $299.99 at the SIHOO US Official Store (Standard Version $259.99, Footrest Version $299.99 (Black and White); the store shows no separate sale price (Standard Version shown as sold out on 2026-10-09)), checked Oct 2026.

What is the SIHOO B100 Pro's weight capacity?

It is rated for 330 lb for the B100 Pro (US official specifications), according to SIHOO's official specifications.

Does the SIHOO B100 Pro have a headrest?

Yes. The official specifications list: Wide 3D adjustable headrest.

What sizes or versions of the SIHOO B100 Pro are there?

It comes in general Dimensions: 27.6"W x 28.3"D x 44.1"-51.6"H.

Where can I buy the SIHOO B100 Pro?

You can buy it from Amazon, the SIHOO US Official Store or Amazon (2-pack, Light Grey). Check the configuration, price and return terms before ordering.

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Where to buy

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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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