Sihoo Doro S300 review: High-quality ergonomic chair

Regardless of whether you spend a long time working in front of your PC or playing games on your computer: a good, ergonomic chair can noticeably improve comfort and relieve the strain on your back in the long term. With the Doro S300, manufacturer Sihoo is launching a very special chair that is said to be “anti-gravity reversible”. Our Sihoo Doro S300 review explains what this means and how good it really is.

Technical data

Sihoo Doro S300: The setup

• Quick and easy assembly
• Only a few steps required

The Sihoo Doro S300 is delivered in a bulky cardboard box containing the individual parts of the ergonomic chair, which weighs around 26 kg. As is so often the case, the new chair naturally needs to be assembled first.

Fortunately, the manufacturer delivers all the individual parts and screws neatly packaged, which makes assembly extremely easy. Anyone who has ever assembled a chair before will also quickly find their way around.

The first step is to assemble the turnstile and insert the five castors. The gas pressure spring is then attached and the upper part of the chair is placed on top. That’s actually all there is to it.

Assembling the Sihoo Doro S300 is very easy, even for non-experts, and can be done in less than 30 minutes. Very good, that’s how we like it.

Sihoo Doro S300 review: design and workmanship

• High-quality, futuristic design
• Robust aluminum frame
• Easy-grip 6D armrests

The new Sihoo Doro S300 is the flagship model of the manufacturer’s ergonomic chairs and is available in either a white or black color scheme. At a price of 809.99 euros for the white model, our expectations are correspondingly high. However, the Doro S300 can also meet these expectations, to say the least.

But let’s start with the design, with which the Sihoo Doro S300 skillfully stands out from the typical gaming chairs and moves in the direction of ergonomic office chairs such as the Flexispot BackSupport BS11 Pro (our test).

With its futuristic-looking mesh fabric parts and robust aluminum frame, the Doro S300 makes an excellent visual impression. The mesh fabric is made of Italian velvet with DuPont TPEE and is therefore not only particularly elastic and durable, but also pleasantly soft.

The non-slip, gray 6D armrests provide a pleasant accent, while four springs on the underside allow dynamic adjustment to the respective sitting position.

The ergonomic chair also underlines its elegant design with its robust and impeccable workmanship. The Doro S300 is BIFMA and SGS-certified and is therefore particularly durable.

However, there is a slight point deduction for the armrests, which are a little too easy to move, especially when moving horizontally. So easy, in fact, that unconscious movements with the elbows are enough to move the armrests slightly forwards or backwards or inwards or outwards. However, this is not really a negative. Many ergonomic chairs or gaming chairs are much more wobbly with their armrests.

Ergonomics and practical test of the Sihoo Doro S300

• Amazingly comfortable anti-gravity mechanism
• Ergonomic back, head and lumbar support
• Very comfortable to sit on

So what is the Sihoo Doro S300’s “anti-gravity mechanism”, which the manufacturer advertises so prominently, all about? And what about ergonomics and seating comfort?

I’m happy to admit that I’m not a big fan of grandiose advertising promises, but in this case there’s definitely more to it than just marketing. Specifically, the Doro S300 relies on a pair of elastic fiberglass plates that adjust individually to the height and weight of the user when they lean back into the reclining position, creating a feeling of weightlessness.

The resulting feeling when leaning back is undoubtedly unique and extremely gentle. However, this results in a comparatively low angle, as a maximum inclination of 130 degrees is possible – other chairs allow a significantly greater angle.

In the Sihoo Doro S300 test, I really liked the shape of the back, head and lumbar support, all of which can be individually adjusted to your own body size and shape.

The upper part of the backrest can be adjusted in five stages independently of the lower part, providing a comfortable position for the shoulders and neck for people between 150 cm and 190 cm tall.

The lumbar support, on the other hand, always remains in position to relieve pressure on the lower back. It consists of two wing-like supports that can be individually adjusted. The spine can be ideally supported in a range of 90 degrees to 105 degrees.

The whole thing is rounded off by a soft headrest which, even without a neck cushion, adapts to the curve of the neck and allows you to rest your head comfortably on it. Okay: A soft neck cushion is a little more comfortable, but the Doro S300 still offers a very pleasant feeling.

The pleasant mesh fabric is also convincing in terms of elasticity and thus ensures a high level of comfort despite the thin material. At the same time, the air-permeable fabric ensures that no sweat is produced even when sitting for long periods and in summer temperatures.

The adjustment options of the Doro S300

• Extensively adjustable armrests; with a little bit of play
• Adjustable seat and backrest
• Maximum load capacity up to 136 kg

A comfortable office or gaming chair must not only offer a high level of comfort, it must also be able to be individually adjusted to the respective body. We have already mentioned that this is possible with the Sihoo Doro S300 in terms of the supports. But of course there’s more.

While we are familiar with 4D armrests from gaming chairs, the Doro S300 even uses 6D. This means that the armrests can be adjusted as follows:

• Up and down (up to 6.5 cm)
• Forwards and backwards (up to 4.5 cm)
• Moved inwards and outwards (up to 8 cm)
• Turned inwards and outwards (up to 72 degrees)
• Angled upwards (up to 35 degrees)
• Angled parallel to the backrest

Apart from the fact that, as mentioned, the horizontal movements are somewhat wobbly, this allows for very comfortable positioning. However, this does not only apply to the armrests: The seat can also be individually adjusted to the respective body.

For this purpose, the Sihoo Doro S300 has controls located on the right underneath the seat. The levers and switches offer the following adjustment options:

• Adjustment of the height of the upper backrest (62.5 cm to 69.5 cm)
• Adjustment of the seat depth (40 cm to 47 cm)
• Backrest tilt angle (100 degrees, 110 degrees or 130 degrees)
• Adjustment of the firmness of the tilt (between 40 and 100 kg)

The height of the chair itself can also be adjusted; the seat can be adjusted between 47 cm and 55.5 cm. This means that the Doro S300 has a total height of 109.5 cm to 125 cm.

The seat width of 51.5 cm is comfortable, but the maximum load capacity is rated at 136 kg, which is presumably due to the lightweight mesh fabric. In contrast to the Flexispot BackSupport BS11 Pro (up to 350 kg), heavier users are therefore not catered for here.

Sihoo Doro S300 test: Conclusion

With the new top model Sihoo Doro S300, the manufacturer has created an all-round convincing ergonomic chair that scores points with its exceptional design, convincing workmanship and wide range of adjustment options.

Particularly noteworthy is the anti-gravity mechanism, which really does provide a unique and comfortable feeling when leaning back. The comfortable back and lumbar supports are also very pleasing.

The soft and breathable mesh fabric also ensures a high level of comfort, while the elastic fabric adapts comfortably to your body shape.

However, the Doro S300 is not entirely free of criticism. The fundamentally successful and soft 6D armrests have a little too much play, especially when adjusted horizontally, and feel a little wobbly, which doesn’t quite match the rest of the workmanship.

Of course, the Doro S300 cannot be blamed for the fact that the white coloring is quite susceptible to dirt. However, you should take this into account before buying. In addition, the seat depth of 47 centimetres is a little small for tall and/or heavy people – but with a maximum load of 136 kg, the chair is somewhat limited here anyway.

Of course, the price should not go unmentioned. Around 800 euros for a chair is undoubtedly a house number, although the quality on offer certainly justifies the price. The price is even higher than that of a Backforce One Plus (our review), which leaves almost nothing to be desired in terms of quality.

The Sihoo Doro S300 is undoubtedly even more attractive when compared to the introductory offer, with which you can save 139.99 euros. Especially as you have the option of returning the chair free of charge for 30 days if you don’t like it. Whether you want to spend that much money on a chair is of course up to you.