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Sihoo Doro S300 "Gravity-Defying" Ergonomic Chair for Premium Comfort

4.7
Rated 4.7 out of 5 stars
69 Reviews
Sale price $599.99 Regular price $799.99

Color: Black

S300 is in stock!

Benefits

  • Supports up to 300 lbs
  • Anti-Gravity Mechanism for a weightless recline experience
  • Dual dynamic lumbar support for personalized lower back care
  • 6D adjustable armrests for ultimate versatility and comfort
  • Cloud-like mesh with Italian velvet for a soft, breathable seating experience
  • Independent backrest adjusts in five levels to fit all body types
  • Spacious headrest for full neck and shoulder support
  • Certified by BIFMA and SGS for trusted quality and durability
  • Endorsed by Forbes, TomsGuide, TechRadar, CreativeBloq and more as a top choice for ergonomic excellence in both work and gaming

Promises

  • 30-Day Free Returns.: Try the chair for 30 days. If it’s not for you, feel free to return it.
  • 5-Year Warranty: Enjoy lasting comfort and peace of mind with our 3-year warranty.
  • Fast Shipping: Receive your chair in just 5-7 days, in US and CA.
  • Satisfaction Guarantee: For any issues, contact support_us@sihoo.com for prompt assistance and guaranteed satisfaction.

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How to choose a right ergonomic office chair?

Check out our buying guide for you!

"Relax and let inspiration flow—sit well and think better."

My sitting experience has been nothing short of comfortable. I’ve used the Doro S300 to work at my desk and reclined backward to watch movies on my projector, and I like its form when reclined backward.

Prakhar Khanna

Prakhar Khanna

from Forbes, Doro S300 review: premium in every way

sihoo doro s300

Work Mode:

Lower the headrest for extra back support and let the adjustable lumbar pads hit just the right spot. Whether you’re tackling emails or powering through a project, the chair keeps your back aligned and comfortable all day long.

Sihoo Doro S300 Ergonomic Chair

Relax Mode:

Kick back, raise the headrest, and recline for that almost weightless feel. The lumbar support stays in place, cradling your back while you relax for movie nights or long gaming sessions.

With a futuristic sci-fi blend of mesh fabric panels and a beefy aluminum spine, and enough visible springs to send any Slinky recoil in horror... These choices add to a luxurious utilitarianism that draws your eyes to each of its meticulous details, which both blends into your workspace and becomes a conversation piece if a friend or colleague ever enters said space.

Jason England

Jason England

from Tom's guide, the reasons why you will love Doro S300

Winner of the German Design Award

doro s300 ergonomic office chair for tall person

The spring seat support significantly improves over column-based or no suspensions. Like a car, this chair has suspension, cushions my drop as I sit down, and adjusts, helping support my weight even if I sit unevenly. Most chairs I have tested have no suspension like this or a simple column-based solution that is far from as good.

Collin Probst

Collin Probst

from Techradar, Doro S300 ergonomic chair review

A weightless recline experience

A weightless recline experience

Doro S300’s mechanism, with aerospace-grade elastic plates, lets you adjust the tension to suit your body. Lean back smoothly to any angle without locking, and easily return to an upright position when you're ready.

Lumbar support that cradles your back

Lumbar support that cradles your back

The wing-like dual lumbar pads adjust to your body and posture, giving you solid lower back support. You can also fine-tune the angle (90°-105°) with the gas lift for a perfect fit.

Everything about the S300 screams quality and Doro S300 is a tinkerer's delight. Every surface can be repositioned so you can find the most comfortable sitting position possible.

12 PR sihoo

Mitch Gassner

from MMORPG, Doro S300 ergonomic chair review

Latest technology 6th generation anti-gravity sensing mechanism

How S300 Chair Helps?

  • sihoo s300 Aerospace‑grade materials

    Aerospace-grade, weightless recline

    Doro S300 uses aerospace-grade glass fiber for its elastic plates, giving you a super smooth, weightless recline that feels out of this world.

  • Comfort for the entire back whatever your size

    Full-back comfort for any size

    The upper backrest adjusts in 5 levels to support your shoulders and neck, whether you’re 5' (150 cm) or 6'3" (190 cm). The lumbar support stays in place to keep your lower back comfortable.

  • doro s300 Coordinated support for the full body

    Dual lumbar support fit for all

    The wing-shaped dual lumbar support has two pads that flex to fit your lower back, adapting to different body types and sitting positions. The gas lift lets you fine-tune the angle (90°-105°) for a perfect fit.

  • Rest your head in spacious softness

    Soft headrest for easy rest

    The soft, integrated headrest contours to your neck for comfort. You can adjust it up for neck support while resting or lower it during work to enjoy more back support.

Specifications

  • Overview

    Designed to elevate your seating experience, the Sihoo Doro S300 features an Anti-Gravity Mechanism and premium materials for unparalleled comfort. Enjoy support that feels weightless and advanced ergonomics that adjust to your every move.

    Name: Doro S300 Ergonomic Chair

    General Dimensions: 28"W x 28"D x 42"-49"H

    Product Weight: 57.12 lbs

    Assembly: Requires assembly

    Materials: ‎Aluminum, Mesh

    Maximum load: 300 lbs

    Warranty: (5) years warranty

  • sihoo doro s300 Specifications

    Chair back lifting height: 42.99" - 49.29"

    Seat depth: 17.13"-18.11"

    Max hip width: 20.08"

    Maximum load: 300 lbs

    Armrests: 6D coordinated armrests (up and down, left and right, front and back, inward and outward, with tilt-lock of armrests, and synchronized recline)

4.7
Rated 4.7 out of 5 stars
Based on 69 reviews
Total 5 star reviews: 49 Total 4 star reviews: 19 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
99%would recommend this product
Slide 1 selected
69 reviews
  • Q
    Quinn
    I recommend this product
    Rated 5 out of 5 stars
    October 20, 2025
    SIHOO S300 Ergonomic Office Chair: Comfortable

    This is a very comfortable office chair. The assembly did take some time so set aside a bit of time and turn on some music. The chair itself is very comfy and I like all the adjustable features as well as the high back and the one piece headrest. All the adjustable functions work well and the construction of the chair is good.

  • P
    Priyavarthanan
    I recommend this product
    Rated 5 out of 5 stars
    October 18, 2025
    Stability and Comfort

    I’ve been using this office chair for a few months now, and it has made a noticeable difference in my comfort during long work hours. The ergonomic design provides good lumbar support, and the seat cushion is firm yet comfortable. The adjustable height and reclining features are smooth and easy to use. The build quality feels solid, and the wheels glide effortlessly across the floor. Overall, it’s a great value for the price and ideal for anyone working from home or in an office setting.

  • P
    Paulo
    I recommend this product
    Rated 5 out of 5 stars
    October 17, 2025
    Comfortable for a good price!

    We've been using the chair for a few months now, and it's very comfortable with no signs of wear so far. Great product at a great price!

  • AA
    Aaron a. M.
    I recommend this product
    Rated 5 out of 5 stars
    October 16, 2025
    Excellent!

    This has got to be my favorite office chair that I've ever ordered online. I'm sitting in it now. It is very nice.Additionally, this chair is very sturdy. It is also the best-packaged chair I've ever received. The assembly instructions were clear enough to understand. (I'll note that the language in the instructions and the language in the bubble-pack hardware kit didn't match exactly, but it was easy enough to figure out.)The assembly did take me a bit longer than other comparable products, but I'm confident that this chair is designed to last a long time.I'm a big guy, maybe 330 lbs or so, and this chair is well suited for me. Thank you!

  • KC
    Kevin C.
    I recommend this product
    Rated 5 out of 5 stars
    October 14, 2025
    Durable and high quality office chair

    Excellent quality and durable, even for larger people. I like the lumbar support that you can adjust at the back. The packaging is very heavy, and the chair is too, which makes it a bit difficult to roll/move around. Overall, however, this is a great office chair for the price point. So comfy that I need to recommend it to you all.