They cause your ears to produce more wax since your body thinks its being invaded by a froigen object. It holds all of my shoes perfectly, it is sturdy once you are done, fabric cover is nice. I post the front camera and back camera videos to show the quality. I had this for TWO years. Otherwise, these are nice shoes. The zipper is unsightly. They are well worth the money. Their friends are complimenting too. I really liked the elastic ankle strap - it fits well initially but hope it doesnt stretch out. 5 and 7, after reading reviews I chose 6.