The Under Armour Men's UA CoreShorts Pro are the first anatomically correct compression shorts. The UA CoreShorts Pro feature a built-in X-shaped elastic support system that stabilizes your core so you can run quicker, recover faster, and perform better than ever before. Under Armour signature, locked-in UA Compression fit reduces muscle vibration so you can last longer than the competition. Your muscles will also start to recognize patterns, creating muscle memory that increases efficiency—so you can push harder without the tired feeling. So get the gear that the pros wear, and trust your best to the X.