The sole of the Leguanos act like a massage

I purchase a pair of Leguanos at the expo during the 2010 Frankfurt Ironman. 

I have used them for four weeks now and would like to report on my experience. I am very pleased with the product, my feet do not get fatigued, and I have comfortable support. The sole of the Leguanos act like a massage, which helps preventing fatigue. Overall, I am very happy with the product. Thank you.