I had bought only Tentatively 2 mats that smelled a little less. Later I bought 4 more mats. They were already very intrusive odor. What helps is to wipe wet well at the outset rub vigorously with a cotton cloth / towel. Because it is foamed material, the smell will stay for a long time.
Generally speaking, I'm more sensitive and get fast headache of odors, but here I have no problems. But that is very individual. This reminds me of the smell very to school sports.
The strength is no match for "Sleeping" or small "yoga mats". These are really right gym mats. Very good, I find the tooth. One can easily completely lift the mats and take apart, without fear that something breaks off.
The colors are garish, as shown in the photo. The structure of the rough surface / rubbelig.
The mats are good non-slip. However, I recommend to the substrate a non-slip, adhesive pad. On smooth surfaces, the mats can slip!
I now every week muscles ...
With exhausted regards,
yt