The mat reporting something, but only if you really drauliegt directly with the nose. But the smell is not so bad, for me anyway ...
Furthermore, now after a month in use (daily 30 min. Exercising) sees the mat a bit "taken" from (dents do not back out, cuts / small tears in the material to see). Have due to the positive reviews expected more!
So, for exercises on your back, the mat is ok, but who expected a little more from the mat, should look around for another!