Husband loves these shirts. Good fit. Good quality.
Men's UPF 50+ Sun Protection Outdoor Short Sleeve Shirt
I used the size chart on the Naviskin website to determine what size to order. Although I wear size large in most shirts, the numbers on the chart indicated I should order an XL. When I received the shirt and tried it on, it was definitely too large. I returned the shirt (had to pay the postage) for a refund. I really like the way the shirt is made, and especially the fact that it is nylon which stays fresher longer than polyester when the weather is hot. So, I suggest simply ordering the size shirt you usually wear and disregard the size chart. I will be ordering the large size after I receive the refund.