Let them be and feel the coolest around in the Nike Boys' Dri-FIT 5 in. Shorts. They are made of 100% polyester. The Dri-FIT technology moves sweat away from your skin for quicker evaporation keeping you dry and comfortable, and their elastic waistband with internal drawcord lets you dial in your perfect fit. The shorts are machine wash safe. Nike Boys' Dri-FIT 5 in. Shorts Royal/Blue/Royal, Small - Boy's Athletic Shorts at Academy Sports