These Karrimor Run Shorts feature an elastic waist, lightweight material and mesh paneling to provide optimal performance while you exercise. Elastic waist. Internal drawstring. Inner mesh briefs. Breathable mesh panels. 100% Polyester. Machine washable. Imported NOTE: This product is sold in U.S. sizes. While the physical product may display both the U.S. & U.K. sizes on it, please place your order using the U.S. size.