4-oz, 100 % Acclimate Dry Polyester, Lightweight Technical Mesh, Acclimate Fresh Anti-Microbial , UPF Sun Protection, Relaxed Fit. All Year Gearï's lightweight, breathable Boxers let you move freely with its loose-cut, soft, breathable fabric. Our fabric wicks away sweat, while anti-odor technology prevents the growth of odor-causing microbes. The truth of the matter remains ï All Year Gear Boxers represent the moisture wicking, odor-kicking, anti-stinking underwear.