Wow 30 day. After applying them from floor to ceiling on every wall in my 13 x 14 studio I have noticed the following results:1. I can?t wear them without irritation and I?ve worn them for two weeks now and can?t be returned! For me, it actually worked much better to make it seem fresh again, not to mention being a lot easier. Wow, they were so comfortable I wore them every day and walked at least 10 miles a day on pavement. They are exactly as advertised. The last order (Feb 2016) the shoes were different. The seller is also very fast responding and I got the order in 10 days! I am very happy with this cell phone bike mount. I guess it can happen.