We recently switched to ANSI 2 rated shirts at work so I was looking for a long sleeve UV protection shirt to spray pesticides this summer. Birds eye mesh seems to be the standard for this type of shirt and I think it's cool as polyester. I have a 2X but saw this 3X for $8 (vs $25 for 2X) and thought loose fit for summer ok. These are really good $8 shirts, but they don't block UV light.