To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
I was using much smaller nipple covers, and the reduced surface area resulted in them sometimes falling off. These are much better, covering my whole boob, with enough surface area not to fall off. I’ve worn them many times and washed them too.