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 have work these shirts for sun protection in very hot weather for years. In all that time I have never found any other shirt to be their equal. They travel well, can be washed and dried very quickly, don't need ironing, and maintain their shape and colour.