|I really appreciate the answers, so far, but I guess that I'd better add a few more qualifiers...|
When it's in the 70's or even the 80's, especially with light breezes, then almost any loose fitting synthetic, bellows-backed shirt will work.
But when it's 95-100+ and humid, with little or no breeze to "flow through" and zero shad for hours on end... then my old nylon/synthetics are miserable. Putting them on just raises your core temp...
In such conditions, I really don't care about pockets, looks, or amenities.
Nor would I ever use a shirt that can't open all the way in the front.. And yes, I understand the implications from the sun and the poor aesthetics for those around me! HA!
Which shirt would y'all enjoy wearing under these conditions (i.e. most of the summer in south Louisiana).