100% COTTON: The mens cotton pajamas set has a softer more supple feel to it than other materials such as polyester, and for that reason is less likely to irritate skin. TOP: Relaxed through the chest, sleeve and waist. PANTS: Sits at the natural waist and trim, with a traditional straight leg. Adjustable Drawstring Waist: The pijamas para hombres feature a loose elastic waistband with an adjustable drawstring making it more relaxing and convenient time at home. Function Fly: These mens cotton pajamas feature solid fly to facilitate access when nature calls. Machine Washable: Wash it before wearing it for the first time to make your cotton sleep pants softer and more comfortable. Besides, please wash it in cold water and wash with similar colors.