"What Our Gearhead® Experts Are Saying: ""I’ve worn this shirt on buggy summer hikes and long fishing trips, and it’s been a game-changer. The No Fly Zone treatment really works—mosquitoes steer clear, and the breathable seersucker fabric keeps me cool in the heat. Plus, it looks great untucked, so I can wear it straight from the trail to town."" We count on the L. L. Bean No Fly Zone Plaid Explorer Long-Sleeve Shirt when the bugs come out in full force. Designed with permethrin-based No Fly Zone® insect repellent, this technical top keeps mosquitoes, ticks, and black flies at bay so we can focus on the adventure—not the swatting. The lightweight, easy-care seersucker fabric feels airy and cool, with a slightly fitted untucked cut that looks as good as it performs. Roll-up sleeve tabs let us adjust for the heat, while UPF 50+ protection guards against harsh sun. With secure chest pockets and a built-in sunglasses wipe, this shirt takes care of the details so we can keep our eyes—and our spirit—on the trail ahead."