Under Armour Run Compression Short - SS15 Ultra-Smooth, Stretch Fabric - Applies graduated, targeted compression to key muscle groups. 4-Way Stretch Fabrication - Accommodates a full range of motion and unimpeded comfort. Also retains shape. Signature Moisture Transport System - Wicks sweat away from the body to encourage a cooler, drier internal environment. Anti-Odour Technology - Quells the spread of odour carrying bacteria. Performance Waistband - Sits comfortably against the skin (can be manipulated easily with an accompanying drawcord).