This Lonsdale Brief offers a comfortable fit, thanks to the stretch construction, elastic waistband, and flatlock seams to reduce the chance of any irritation. Stretch construction. Elastic waistband. Keep away from fire. 95% Cotton, 5% Elastane. 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.