This SIHOO B100 Pro review looks at a mesh office chair that combines adaptive lumbar support with a retractable footrest for desk work and breaks.
SIHOO B100 Pro Review Summary
The quick verdict

16,000+ ratings
Read Amazon ReviewsSIHOO B100 Pro
A mesh office chair with adaptive lumbar support, a retractable footrest and lockable recline for people who want work and rest features in one seat.
- Adaptive elastic lumbar support paired with a dual-back design.
- Retractable footrest for stretching out during breaks.
- 4D armrests that adjust, rotate or flip, plus recline locking at 110°, 125° or 135°.
- Widened seat cushion and 3D ultra-wide headrest.
Pros
- Adaptive lumbar support and a dual-back design intended to follow posture changes.
- Retractable footrest supports stretching out for breaks.
Consider before buying
- The up-to-300-lb capacity may not fit buyers whose required support exceeds that limit.
- The recline choices are three set angles, so buyers seeking a different range should check whether those positions fit their preferred working and resting posture.
Read the full review summary
The B100 Pro pairs a dual-back design intended to move with the spine with a retractable footrest, a widened seat cushion and a wide 3D headrest.
Those features make it worth considering if you want a chair that can shift between focused desk use and stretching out during a break.
Its full-mesh seat and back promote airflow, while the armrests rotate or flip and the recline locks at three angles.
This setup suits home-office users, gamers and students who value posture adjustments and an integrated place to rest their feet; the listed capacity is up to 300 lbs.
The buying factors
SIHOO B100 Pro Scorecard
Editorial scores reflect listed features and buyer fit; they are not laboratory measurements or customer ratings.
Lumbar support
The elastic lumbar support and dual-back design are intended to move with the spine as sitting posture changes.
Recline flexibility
Three lockable angles give the chair options for focused work and leaning back during a break.
Footrest utility
A retractable footrest adds a way to stretch out without a separate footrest.
Breathable materials
Mesh covers both the seat and back, promoting airflow during long workdays or gaming sessions.
Armrest adjustment
The 4D armrests adjust, rotate and flip, offering several ways to change arm position or clear desk space.
Capacity and base
A reinforced metal base and Class 4 SGS-certified gas lift support up to 300 lbs.
Key Features and Specifications of SIHOO B100 Pro
- Adaptive elastic lumbar support paired with a dual-back design.
- Retractable footrest for stretching out during breaks.
- 4D armrests that adjust, rotate or flip, plus recline locking at 110°, 125° or 135°.
- Widened seat cushion and 3D ultra-wide headrest.
- Full-mesh seat and back designed to promote airflow.
- Reinforced metal base and Class 4 SGS-certified gas lift support up to 300 lbs.
- 36-month coverage and 30-day easy returns.
Pros and Cons of SIHOO B100 Pro
Pros
- Adaptive lumbar support and a dual-back design intended to follow posture changes.
- Retractable footrest supports stretching out for breaks.
- Several recline angles and adjustable, rotating, flip-up armrests offer ways to change position.
- Mesh on both seat and back promotes airflow.
- A 36-month coverage period and 30-day easy returns are included.
Consider before buying
- The up-to-300-lb capacity may not fit buyers whose required support exceeds that limit.
- The recline choices are three set angles, so buyers seeking a different range should check whether those positions fit their preferred working and resting posture.
- For buyers who prefer an upholstered rather than mesh seat, the full-mesh construction may not be the right match.
Who Should Buy SIHOO B100 Pro?
Good fit
Consider the B100 Pro if you want lumbar support that is designed to move with posture, plus a footrest that pulls out for breaks.
The combination may suit a home office that doubles as a place for gaming or watching movies after work.
It is also a candidate for people who want airflow-promoting mesh, a wide headrest and multiple recline positions. The armrests can rotate or flip, and can be moved under a desk to free space when needed.
Who should skip it
Skip it if the 300-lb capacity does not meet your needs, or if you need a recline position outside the three available angles.
A mesh seat may not suit you if you specifically want an upholstered seating surface.
SIHOO B100 Pro: Support and Break-Time Design
Lumbar support that moves with posture
The dual-back design and elastic lumbar support are intended to adapt as you lean forward, sit upright or shift position.
That approach may appeal to people who change posture through a workday, though individual fit depends on how the support aligns with your body.
Recline and a built-in place to stretch out
The footrest and three recline angles make break-time positioning a central part of the chair's design.
Buyers who want one seat for desk tasks and occasional lounging can weigh that flexibility against whether the available angles match their preferred positions.
Mesh, headrest and arm adjustments
Full-mesh construction promotes airflow, while the 3D wide headrest and 4D armrests provide additional adjustment points. Together, these details give buyers several areas to tune around desk work, but they do not guarantee a particular comfort outcome.
Alternatives to SIHOO B100 Pro
Home Office Desk Chairs alternative

16,000+ ratings
Read Amazon ReviewsSIHOO M18 Ergonomic Office Chair
Choose the M18 if adjustable headrest and lumbar support with mesh better fit your desk setup; choose the B100 Pro if its adaptive dual-back support and retractable footrest better match your work and break routine.
- The M18 has adjustable headrest and lumbar support, breathable mesh and a stated capacity of 330lbs.
- The B100 Pro has adaptive lumbar support and a retractable footrest for stretching out during breaks.
Home Office Desk Chairs alternative

16,000+ ratings
Read Amazon ReviewsSIHOO M57 Ergonomic Mesh Office Chair
Choose the M57 if adjustable headrest and lumbar support with a continuous 90° to 126° recline range suit your sitting routine; choose the B100 Pro if you want a retractable footrest and its three specified recline positions.
- The M57 has an adjustable headrest and lumbar support, with recline from 90° to 126°.
- The B100 Pro has a retractable footrest and three lockable recline angles for shifting between desk work and breaks.
Is SIHOO B100 Pro Worth It?
The SIHOO B100 Pro is worth considering if you want a mesh office chair with adaptive lumbar support, 4D armrest adjustments, a retractable footrest and recline positions for breaks.
Its design brings work and lounging functions together, with an up-to-300-lb support limit.
Before buying, decide whether the mesh seat and its three recline angles suit your preferences, and confirm the stated capacity works for your needs.
If those tradeoffs align, the B100 Pro's feature mix suits a workspace where posture changes and occasional stretching out matter.
Your review at a glance

16,000+ ratings
Read Amazon ReviewsSIHOO B100 Pro
A mesh office chair with adaptive lumbar support, a retractable footrest and lockable recline for people who want work and rest features in one seat.
- Adaptive elastic lumbar support paired with a dual-back design.
- Retractable footrest for stretching out during breaks.
- 4D armrests that adjust, rotate or flip, plus recline locking at 110°, 125° or 135°.
- Widened seat cushion and 3D ultra-wide headrest.