Under Armour Authentic Women's Running Tights Compression - An ultra-tight, second-skin fit which delivers a locked-in feel that keeps your muscles fresh and your recovery time fast. Ultra-Tough Smooth Stretch Fabric - Delivering unrivaled UA Compression. 4-Way Stretch Fabrication - Allows greater mobility and maintains shape. Signature Moisture Transport System - Wicks sweat away from the body. Wide Waist Band - A yoga inspired waisted band, with hidden pocket provides a secure place for smaller items.