Under Armour Run Compression Tight - Medium - Black Compression Fit - Assists with boosting muscle performance and lowers fatigue. Signature Moisture Transport System - Wicks sweat away from the body. Anti-Odour Technology - Prevents the growth of odor causing microbes. Flatlock Seams - Help to reduce potential skin irritation. Internal Drawcord - Allows the wearer to determine their own waist fit for personalised comfort.