Today I purchased a Polo custom-fit, red and white gingham, long-sleeve linen shirt. Planning to wear it for an afternoon of tailgating and an evening football game in Tuscaloosa, Alabama in mid-September. No doubt the weather will be hot and humid. Would you recommend wearing it with a v-neck undershirt, or without an undershirt? I normally wear an undershirt with any cotton button front shirt, but never wear one with a short sleeve polo collar shirt. Since the shirt is linen I am thinking the undershirt may hamper linen's advantage to handle moisture.