The Mountain Hardwear Men's Wicked Lite Double Short Sleeve T is great for day hikes, wearing as an undershirt or wearing while at the gym. Made with Wicked Taper Mesh fabric that wicks moisture and dries quickly. Natural Chitosan antimicrobial finish controls odor. Flat lock seam construction eliminates chaffing. Semifitted cut with side contrasting panels moves moisture away from your skin and allows maximum airflow with its open-knit mesh structure. Sizing (Chest):Â S: 36-38", M: 39-41", L: 42-45", XL: 46-49".