This was my first experience with nipple covers and since I'd heard good things about them I thought I'd give them a try. Sadly, I was not impressed for two reasons. #1 They don't stay on. Literally fifteen minutes after I put them on, after one or two uses (which only lasted at the most 30 minutes), they would start to slide down. #2 I have really small boobs which is why I figured these would work, but because of something (the material, weight, shape, I'm not exactly sure) they made my boobs/nipples protrude through shirts just like they would without a bra but bigger; the exact thing I was trying to avoid. I wouldn't recommend these to anyone because frankly they're a waste of money. I'd suggest doing some online research and finding a pair with better reviews.