From Website: One patch chest pocket Slim fit V-neck Side seam slits for movement Locker loop at back neck Engineered with Technical Comfort™ Features our proprietary FIONx™ fabric with four-way stretch, moisture-wicking, anti-wrinkle and ridiculously soft properties and Silvadur™ antimicrobial technology, which provides odor protection, inhibits the growth of bacteria, yeast, algae, and other microorganisms that cause odor and fabric damage, and increases the lifespan and durability of the product