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.
The sides by my arms poked out so it is uncomfortable without a shirt. Of course I wear a shirt all the time so it works, but I’d rather not spend the money on something that hurts while I am getting ready.