Thank you for your reply. I was talking about spikes, because I thought about acupressure mat, when I was writing my previous reply. I heard, that acupressure mats are used to stimulate inner points of our body, which is very healthy and easy to use. I am planning to try something like this.. I have never tried it before, so that is why I am trying to find out more information here, before do and buy it :-) As I said before I have sensitive skin, and I do not want to buy anything synthetic and non-natural, therefore I am wondering if there are any solutions for me to buy ecologically clean acupressure mat, made of purely natural materials?