These are a life saver.  I didn't know they existed until my next door neighbor told me about them.  These are the same ones she has and hers were 3 times as much as I paid for these.  I don't wear a bra so I go around with my headlights on all the time and hate it.  Now that problem has been solved.  These are thin, fit well over the nipple and completely solve the problem of the headlights.  I am very, very pleased with them.  I don't know how they could be improved upon.  I definitely would recommend these to anyone, they are wonderful and very reasonably priced.