I was disappointed.  I purchased these on amazon to replace a different brand purchased from a discount store.  My original pair lasted a LONG time.  (adhesive was only guaranteed for 20 wearings, or something similar.  I used them all the time under t - shirts or when I wanted to go without my bra and they were great and the adhesive lasted many times past the original guarantee.)  I purchased these as a replacement and after the first couple uses, I began to find they fell off while I was wearing them.  They just aren't "sticky" enough to feel confident using them.  They also have a "lip" to them where the silicone isn't smoothly tapering on the edges.  I won't purchase them again.  I created this review without reading others, so if I repeat what they said, then there you go.  If this is new information to you, beware.  :)