I have been suffering with tendinitis. AN UPDATE: these lasted approximately two months. Good product considering the price. It has an accurate fit and appears to be nice quality. When its just a single speaker, its good, but the L/R pairing has been hit and miss in its consistency of playing audio properly. The mic needs to be adjusted frequently, I had people tell me that they could barely hear me unless the mic was right near my lips. Investigating is not hard if you know what to look for, but it is very time consuming. I highly recommend this over more expensive speaker that sound the same or worse. Like most of us, I dont have perfect feet in terms of even wear, and it is only the outer edge of the right sandal that has worn right down to the footbed. Makes a great paper weight though