The article looks serious; Comfort is the appointment but I will have to test several kilometers to check its usefulness on a plantar fasciitis. I do not like the little booklet on the various products of the brand: rien in French. some references in English and others in German so if you are bilingual English / German, ok. If one is anglophone, one discovers that one third of the range (ref 60002.4 and 9) and that if we are speaking ... move along, nothing to see! So SPENCO, a little effort on a European Communication SVP.