Don't Last and Leave Residue; Won't Buy Again
I've used these for about 11 months and the most any have stayed on the glasses is about 2 weeks (and that was rare).  The silicone is about the right thickness and seems it would last indefinitely, but the pads stick on with double-sided adhesive tape.  The side to the glasses adheres well, but the adhesive quickly gives way on the pad side; then the pads go into the eyes or elsewhere on the face, without warning.  (This happens quicker the more frequently you clean the glasses.)  So you end up throwing away a perfectly good silicone pad because it no longer sticks.  And when you remove the sticky tape left on the glasses, it leaves residue that gets on the eyeglass lenses and is hard to remove because it gets on the cleaning cloth and smears.  Thankfully, 32 pairs is enough to last about a year, but they are messy and inconvenient to change so frequently.
Rating: 1 stars