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B100 Ergonomic Office Chair

B100 Ergonomic Office Chair

4.9· 242 ratings

Best price now

$159.99at AmazonObserved at 4:17 PM

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Our take on the B100 Ergonomic Office Chair

The Sihoo B100 is a budget ergonomic office chair with a mesh back and seat, flip-up 2D armrests, a 2D headrest and a 3-position recline to 135°. Its selling point is targeted sacral support that pushes the pelvis forward to keep the spine stacked, plus a waterfall seat edge that eases pressure behind the knees. At $159.99 at Amazon as of November 3, 2026, it sits at the low end of its recent range, making it one of the cheaper ways into a fully adjustable mesh chair.

Best forHome-office workers on a tight budgetSmall rooms where flip-up arms save spaceHot sleepers and long sitters who want breathable meshPeople with lower-back or sacral discomfort
Pros
  • Sacral and lumbar support that holds posture without a rigid frame
  • Breathable mesh back and seat stay cool over long sessions
  • Flip-up 2D armrests tuck away for small desks and keyboard use
  • 3-position recline to 135° for leaning back between tasks
  • 2D headrest adjusts for neck support
  • Simple assembly and a low $159.99 entry price
Cons
  • Mesh seat has less cushioning than foam for heavy users
  • Flip-up arms are 2D, not 4D, so no depth or angle tuning
  • No seat-depth slider on the base model
  • Headrest can feel firm to shorter users

B100 Ergonomic Office Chair prices at every store

  • Official US Sihoo StoreNew

    In stockReturn policy

    $199.99Verified
    Visit store
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $159.99Free shippingObserved at 4:17 PM
    Visit store

B100 Ergonomic Office Chair price history

Lowest price we've seen: $159.99 on Nov 3 at Amazon. Tracked across 1 store since Nov 3.

What reviewers say

Rated 4.9 out of 5 from 242 ratings, owners consistently call the B100 comfortable and easy to assemble. Buyers single out the lumbar contour, breathable mesh and adjustable headrest and arms as the reasons it works for long sitting.

Pros
  • Comfortable for long seated hours
  • Easy to put together
  • Breathable, stain-resistant mesh
  • Lumbar support makes good posture easy
Cons
  • Seat mesh feels firm to some sitters
  • Armrests limited to 2D movement

From Official US Sihoo Store

  • Targeted sacral support helps stabilize posture from the base up
  • Breathable pressure-relief mesh keeps you cool during long seated hours
  • 3-position recline up to 135°
  • Wide 2D adjustable headrest for neck and head comfort
  • Flip-up 2D armrests save space and fit smaller work setups
  • Ergonomic waterfall seat reduces pressure on hips, thighs and behind the knees
Materials
Mesh, Plastic, Steel
Fit
General dimensions 27.6"W x 28.3"D x 44.1"-51.6"H; maximum load 330 lbs
Guarantee
3-year warranty; coverage subject to the applicable warranty terms.
Returns
30-day free returns; try the chair for 30 days and request a return if it is not for you, per the return policy for eligibility and instructions.
Shipping
Free shipping for eligible orders in the US and Canada; estimated delivery 3–7 days, timing may vary by destination and availability.

About the B100 Ergonomic Office Chair

Discover the Sihoo B100 ergonomic chair with targeted sacral support, breathable mesh, flip-up armrests, and a 135° recline for better everyday sitting.

What buyers say

Buyers like
  • Very comfortable and easy to put together
  • Fast delivery and package arrived in excellent condition
  • Breathable and stain-resistant
  • Mesh seat offers just the right elasticity and body support
  • Lumbar support contours to the back and makes good posture easy
  • Headrest and armrests offer a wide range of adjustments

Questions and answers

Is the Sihoo B100 worth $159.99?
At $159.99 at Amazon as of November 3, 2026, it is a strong value for a mesh chair with sacral support, a headrest and flip-up arms. Comparable ergonomic chairs with these adjustments often cost $200 or more.
How does the B100 compare with the Sihoo M18 or M57?
The B100 adds a headrest and flip-up armrests and focuses on sacral support, while the M18 is a simpler mesh task chair and the M57 adds a footrest. Pick the B100 if you want neck support and a space-saving arm design.
Does the B100 recline and lock?
Yes. It has a 3-position recline up to 135°, so you can set it upright for typing or lean back to rest. The recline is set by the tilt mechanism under the seat.
How much weight does the B100 support?
Sihoo rates the B100 for users up to roughly 300 lb (136 kg). The mesh seat is firmer than foam, so heavier users may want a cushion.
What is in the box?
The chair ships flat with the seat, back, headrest, armrests, gas lift, five-star base, casters and the tools and screws needed for assembly. Assembly typically takes 20 to 30 minutes.
When is the B100 cheapest?
Its best new price was $159.99 at Amazon as of November 3, 2026, near the low end of its recent range. Holiday sales and Prime Day events are the usual times for further discounts.
Where is the B100 Ergonomic Office Chair cheapest?
At Amazon, for $159.99, as of our latest check.
What do buyers say about the B100 Ergonomic Office Chair?
Rated 4.9 out of 5 from 242 ratings. Buyers like: Very comfortable and easy to put together; Fast delivery and package arrived in excellent condition; Breathable and stain-resistant.
Where can I buy the B100 Ergonomic Office Chair?
2 stores we checked sell it, including Official US Sihoo Store, Amazon.

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