Under Armour Women's Favorite Leggings Ao Machine Wash Lightweight Performance Cotton Fabric - Soft, lightweight and delivers incredible comfort. Signature Moisture Transport System - Wicks sweat and faster than ordinary cotton. Lightweight stretch construction - Improves mobility for full range of motion. Anti-microbial technology - Fights odours to keep your gear fresher for longer. Soft, covered elastic waistband - With a rise that sits just right on your hips.