Anyone looking for an ergonomic office chair at a premium level quickly ends up with big names such as Herman Miller or Steelcase and just as quickly with prices that go beyond the budget of many home offices. This is exactly where the Sihoo Doro S300 comes in. High-quality features, modern ergonomics, elegant design, but significantly cheaper. Our detailed practical test shows whether it lives up to this claim and how it performs in everyday use. And I’ll go even further, because I’ll be using this chair intensively over a longer period of time and will then also report on the long-term experience, because of course it’s not possible to say much about it after a month. However, as there are no reliable tests available yet, I’m going to put the chair to the test until I notice something, or not. I will of course ignore all the influencer tests in my judgment, but will report on my chair-related sensitivities in an unbiased and fair manner.
Unboxing and description
The Sihoo Doro S300 is delivered in a solid, neatly printed cardboard box. With a gross weight of around 27 kg, the package is significantly heavier than many entry-level chairs and should be moved by two people if possible. Appropriate warnings and carrying handles make handling easier.
There is a clear advantage when unpacking. The backrest and seat are already pre-assembled. This not only saves time during assembly, but also reduces sources of error, as important connections have been cleanly and stably joined together straight from the factory. This makes assembly much quicker and the end result immediately looks more solid than if you had to screw everything together yourself. The packaging, on the other hand, is less attractive. Unfortunately, Sihoo does not use plastic. Almost all parts are wrapped several times in foil or bubble wrap. Although this provides reliable protection against transport damage, it also results in a lot of plastic waste. Here, the developers could take a leaf out of the book of other manufacturers who use more environmentally friendly solutions with cleverly cut cardboard or paper cushions.
The backrest consists of a sturdy metal frame with an elastic DuPont TPEE mesh. According to the manufacturer, this material should remain elastic for over 10 years and is pleasantly breathable. In fact, the ventilation is noticeable during long periods of sitting: Even after hours, no heat builds up. The special highlight is the dynamic, dual lumbar support. Two flexible elements automatically adjust to your posture and provide noticeable support for the lower back. In the test, this was very comfortable, the pressure is evenly distributed without being too hard or too spongy. The support is also maintained when leaning back.
The upper part of the backrest is shaped slightly forwards so that it supports the neck comfortably when you lean back. Thanks to the flexible mesh covering, the head/neck area adjusts automatically, even if the fine adjustment is not as variable as with classic 3D headrests, providing harmonious support for users who frequently switch between upright and reclined sitting positions without having to fiddle with adjustment buttons. However, those looking for millimeter-precise adjustments may see the rigid integration as a disadvantage.
Like the backrest, the seat is completely covered with high-quality TPEE mesh. The material is stretched tightly, supports the body comfortably and yields only slightly without sinking in. The big advantage is its breathability, which reliably prevents heat build-up, even during long periods of sitting in summer. Thanks to the adjustable seat depth of around 40 to 47 centimetres, the seat can be easily adjusted to different body sizes. However, I was unable to confirm the width of around 51.5 centimetres stated by the manufacturer; I actually measure 48 centimetres. This is followed by the plastic edge, which could be annoying for wider people. In the practical test, I noticed positively that the mesh offers very even pressure distribution. You sit comfortably and feel a gentle, springy support over the entire surface. Those who are used to heavily upholstered seats may find the tight tension of the mesh unfamiliar at first. In the long term, however, it proves to be the better ergonomic choice.
In contrast to many inexpensive chairs, the Sihoo S300 has a metal base rather than a plastic one. This provides a noticeably stable foundation and clearly sets the chair apart from simpler models. With a diameter of just under 70 centimetres, the chair stands very securely without appearing bulky. However, the test showed that some beads of sweat remained on the feet, which can be sharp-edged and pose a risk of injury. A better final inspection by the manufacturer would be desirable here, and you should definitely wear the enclosed assembly gloves when setting up. The 60-millimeter castors run quietly and smoothly, both on hard floors and on carpet. Unfortunately, they are made of plastic and not metal, which you might expect from a chair in this price range of around €800. If you have sensitive floors, you can still use the chair in everyday life without hesitation; an additional floor protection mat is not necessary in most cases.
The 6D armrests can really be adjusted in all directions. Height, width, depth, angle and even sideways. This means that everyone should be able to find a suitable position, whether for concentrated typing or relaxed leaning back. The cushions are made of soft PU material, which is pleasant to the touch and does not pinch even after long periods of sitting. The implementation of the mechanism is less attractive, as the backrests seem a little wobbly overall and are too easy to move. This means that you have to readjust them every now and then if you unconsciously lean on them. Nevertheless, the armrests are a real improvement on the rigid minimalist solutions found in many cheaper chairs. This shows that versatility is top, fine-tuning is flop.
The gas pressure spring of the Sihoo Doro S300 belongs to class 4 and, according to the manufacturer, is designed for a load of up to 136 kg. In the practical test, it proved to be very stable, while its durability can only be conclusively assessed over longer periods of use. The height adjustment runs smoothly and evenly, without jerking or uncontrolled sagging of the seat. A particularly positive feature is that the spring precisely supports the continuous adjustment of the seat height, allowing the chair to be quickly and easily adapted to different user sizes. Even for slightly heavier people, the seat remains reliably in the selected position.
Sihoo Doro S300 "Gravity-Defying" Ergonomischer Bürostuhl, weiß
 | Lieferzeit 2-5 Werktage | 669,00 €*Stand: 23.12.25 02:46 |
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