Sihoo Doro S300 "Gravity-Defying" Ergonomic Chair

Sale price$799.99 USD Regular price$899.99 USD
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Sihoo Doro S300 is the most advanced ergonomic chair from Sihoo so far. It's engineered to redefine seating comfort with its Anti-Gravity Mechanism and other innovative features. Experience support and comfort that seems to defy gravity in Sihoo Doro S300.

  • Anti-Gravity Mechanism made with aerospace‑grade glass fiber
  • A weightless recline experience
  • Coordinated support for the full body
  • Customizable dual dynamic lumbar support
  • Spacious integrated headrest
  • Winner of German Design Award 2023

Defying gravity, Redefining comfort

Aerospace‑grade materials, Anti-Gravity Mechanism

The mechanism inside the Sihoo Doro S300 features a pair of elastic plates made of aerospace-grade glass fiber, the same material used in spacecraft. This choice ensures high elasticity and adjustability, mirroring the robustness required in space exploration. The result is a revolutionary weightless recline experience.

A weightless recline experience

With the help of elastic plates made of aerospace-grade glass fiber inside the mechanism, regardless of your size and weight, you can adjust the tension to suit you. Whenever you need to relax a bit during your work, you can smoothly recline on the Sihoo Doro S300, stop at any angle you want (without the need to lock the backrest at a certain angle), and return to an upright position effortlessly.

Coordinated support when reclining

When reclining in a standard chair, the increased pressure on your thighs can lead to muscle strains, especially during prolonged periods. The Sihoo Doro S300's seat cushion and armrests automatically adjust to coordinate with the backrest when reclining. This feature ensures that various parts of your body remain relaxed and comfortable, enhancing your overall seating experience.

Lumbar support that cradles your back

The wing-like dual dynamic lumbar support consists of two separate pads, offering comprehensive and dynamic support for your lower back, regardlessly of your body shape and sitting posture. Additionally, the gas lift allows you to fine-tune the lumbar support (90°-105°) for a perfect fit.

Comfort for the entire back whatever your size

The upper half of the backrest can be adjusted separately in 5 levels, providing adequate support to your shoulders and neck, whether you're 5' (150 cm) or 6'3" (190 cm). Meanwhile, the lumbar support stays in the right place to perfectly support your lower back.

Rest your head in spacious softness

With the soft-to-the-touch headrest that perfectly contours to the curve of your neck while providing a generously sized surface, you can comfortably rest your head on the side and relax from your tasks.

Award-winning esthetics

Sihoo Doro S300, a winner of a German Design Award, is not only comfortable to sit in but also pleasing to look at. The main structure of the chair is crafted from a single piece of aluminum alloy, created through 13 procedures to achieve its beautiful and magnificent appearance.

Cloud-like comfort

The mesh materials of Sihoo Doro S300 are woven in a special way with Italian velvet and DuPont TPEE. The result is that the mesh is highly elastic, durable, pressure-relieving, and soft to the touch.

Shock-absorbing, pressure relieving

To provide a more pressure-free seating experience, the Sihoo Doro S300 comes equipped with a suspension system. This system effectively absorbs shock when you sit down on the chair and dynamically adjusts to changes in your seating position.

6D armrests for arm support
in all positions

The armrests of the Sihoo Doro S300 lead the industry by providing adjustments in six directions, ensuring optimal support for your arms, regardless of your sitting position.

Easily adjustable, perfectly suitable

All controls are positioned on your right-hand side, allowing you to effortlessly adjust the height, seat depth, recline, and recline tension. The extensive adjustability also ensures that Sihoo Doro S300 comfortably accommodates various body shapes.

Robustly built, rigorously tested

Engineered with premium materials and in leading crasftmenships, Sihoo Doro S300 also underwent numerous tests before being delivered to your hands. It's also BIFMA and SGS certified for extra peace of mind. Enjoy years of comfort with your Doro S300.

We guarantee

Express Shipping

Receive your chair in just 5-8 days on average.

30-Day Free Returns

If you're not satisfied with your chair, return it for free within 30 days.

3-Year Warranty

Enjoy a 3-year warranty for your peace of mind.


Product Name

Sihoo Doro S300 "Gravity-Defying" Ergonomic Chair


Italian velvet, DuPont TPEE


6D coordinated armrests

Maximum Load

136 kg (300 lb)

Seat Depth

43.5 - 46 cm (17.13 - 18.11 in)

Max Seat Width

51.5cm (20.28 in)

Seat Cushion Height Range

46 -55 cm (18.11 - 21.65 in)

Net Weight

26.2 kg (57.76 lb)


Our customer support is available Monday to Friday: 8am-8:30pm.Average answer time: 24h