To get an idea of the relative quality and performance of the yoga mat, it is tested and compared with a selected premium product in the same category. Yoga mats are tested in two categories:
Hot yoga mats are mats that absorb moisture particularly well. They feature a microfiber or suede coating/surface laminated to a rubber mat. The coating is intended to ensure that moisture such as sweat is absorbed well or that the mat can be sprayed before use to provide better grip. More traditional mats are made of a homogeneous material such as PVC or TPE and do not absorb moisture to the same extent as a hot yoga mat. The laboratory tests are carried out by the Swerea IVF research institute in Mölndal (part of RISE, Research Institutes of Sweden). The tests cover the following areas:
Washing and drying according to SS-EN ISO 6330:2012 standard. Machine wash at 30°C followed by flat drying at room temperature. Thermal aging in the climate chamber over 14 days at a temperature of 70°C and a relative humidity of 50%.
The so-called coefficient of friction is measured according to the SS-EN 14882:2019 standard on dry and wet top surfaces as well as on dry bottom surfaces. A cork-covered pulling body weighing 700 grams is pulled over the mat. The force required to move the body is recorded (coefficient of friction). The higher the coefficient, the better the slip resistance. Hot yoga mats achieve significantly better slip resistance on wet surfaces. Moisture does not have the same effect on more traditional yoga mats made of PVC or TPE.