SUMMARY

The YOS S1 stool seat from the brand YOS has convinced with a very good score and qualified for our Qualitätssiegel.de test seal, and was ultimately rated with the final grade 1.1.

Short product info:

The YOS S1 ergonomic office stool from the brand YOS promotes active sitting posture, reduces back pain, and increases productivity through continuous movement and individual height adjustment.

About the test:
We conduct our product tests according to a transparent and coherent evaluation system. Points such as packaging, functionality, quality, customer reviews, or the price-performance ratio are included in the final grade.
The maximum possible number of points per area is 100 points.
The following areas are evaluated:

1. The packaging
2. The first impression
3. The Practical test
4. The price-performance ratio

Furthermore, the available product reviews and customer experiences for the product are also included in the evaluation.

Important to know: 
When awarding our Qualitätssiegel.de test seal, we assess the quality of the test product not in comparison with other products available on the market, but in comparison with our standardized Qualitätssiegel.de testing standard!
Further details on the test criteria can be found here.

Below is our detailed test report on the product.

QUALITY SEAL.DE TEST REPORT

Product: Stool YOS S1
Brand: YOS
Tested: 14.05.2025
QS code: 71351738

1. THE PACKAGING

In the outer packaging made of cardboard, the YOS S1 stool was located.
A further inner packaging was dispensed with.

We found the sustainability of the packaging to be flawless.

The product was very well protected by the packaging.

The brand name, address, and a contact option as well as the barcode are clearly visible on the outer packaging.

2. THE FIRST IMPRESSION

Upon unpacking the product, no bad smell was detected.

The YOS S1 stool is delivered without accessories. An instruction manual is included. 

3. THE PRACTICAL TEST

The YOS S1 office stool was designed to promote an ergonomic sitting posture and reduce back pain through dynamic sitting. 
The YOS S1 stool serves this purpose excellently.

Below we briefly explain the functionality of the test product:
The most important function of the YOS S1 office stool is to promote a healthy sitting posture through ergonomic design, dynamic sitting, and active support of the micro-musculature. 

The ergonomic stool seat was comprehensively evaluated in the test report.
The height adjustability allows for individual adjustment to different body sizes and working heights.
The movable seat surface promotes dynamic sitting and activates the back muscles.
Seating comfort and padding are pleasantly thick, shape-stable, and breathable, which also ensures a pleasant seating feeling even with prolonged use.
The stability and tipping safety prevent tipping over during movements.
The maximum load capacity is clearly stated and ensures stability even with daily use. Overall, the stool seat convinces in all tested quality features.

The tested quality features meet the established requirements of quality testing.

We found particularly outstanding

• • Ergonomic, round design with a diameter of 30 cm and 360° rotatability

  • Fully padded with durable, shape-stable seat foam for high seating comfort

  • Cover made of robust polyester fabric (83,000 rub cycles) for long durability

  • Infinitely height adjustable (55.6 – 81.7 cm) 

The product has a clear benefit and thus offers the user among other things the following advantages:

• • Stable plastic base with convex-shaped, non-slip rubber underside for dynamic sitting and oscillation effect (± 10° tilt)

  • Load capacity up to 120 kg

  • Promotes dynamic sitting and activates the micro-musculature for back and core strengthening

  • Improves concentration and prevents back pain

  • Developed and manufactured in Germany for high quality and safety

  • Delivered fully assembled, ready for use immediately

The Hockersitz YOS S1 is very good to use.
Our testers found no risk of injury from sharp edges or protruding parts with proper use.

4. THE PRICE-PERFORMANCE RATIO

On the trading platform Amazon, the Hockersitz YOS S1 of the brand YOS can be ordered for €199.

Thus, this product is in the mid-range price segment, as there are already other office stools available from €99.99.

This product has not yet been rated on Amazon.