Under Armour HeatGear Core Short Prima Compression Shorts - Medium - Black Heatgear - For when it's hot. Keeping athletes cool and dry. Lightweight, high-performance fabric maximizes comfort and breathability. Moisture Transport System - Under Armour's signature Moisture Transport System wicks moisture from your skin, keeping you dry and your body temperature consistent in any condition 4-way stretch improves mobility/comfort and accelerates dry-time for the athlete. Flatlock Seams - giving you amazing comfort and redusing any rubbing or chaffing which can occur Anti-Odor Technology - prevents the growth of odor causing microbes.