Flats Guide II shirts are extremely lightweight and designed for quick drying. This results in a cool, comfortable fit - even when stalking big tarpon or bonefish on a warm, tropical flat. The shirts feature two chest-storage pockets, chest vents and back venting for breathability. Antimicrobial odor reduction will ensure that anglers are pleasant to be around, and a UPF 30+ coating will protect them from the sun. The long-sleeve style also features the company's innovative, one-handed "quick toggle" sleeve. www.underarmour.com.