They are NOT kidding, it runs tight/small... but this is PRECISELY what I needed for my purposes, as an umpire. I wear this under my chest protector, and the mock neck is the perfect height and material for the need, and the dri-fit tech means I can rely on this to save me even with 100+ temps like I'll have for many of the next several weeks. Just a perfect product--better still if it was offered in a short-sleeve design, but I can manage that just fine!
