" I will be using my phone silk this Saturday for my first 1/2 marathon race at the Illinois Marathon. I gave one of the extras that you sent to my running partner who helped me train and he's going to wear it the day of the race, as well. I have washed mine several times and they wash up great! They don't loose their shape, my smart-phone never moves while I run & I actually forget that I even have it on. I truly love this product!!"