WTF is a “combat shirt”? I assume a quick drying shirt that’s labeled “combat” to sound cool like so many other things these days?I've been wearing the two piece for the past four years. By itself it's not much of an upgrade. However, when combined with a combat shirt and flying in the east county area I wouldn't want to fly with anything else. The temperature difference with a combat shirt and a one piece is vastly different. Much more comfortable when you're sweating your ass off in a desert.