Yes, it'll control sweat when he's swinging for the fences during practice. But, unlike traditional fully polyester activewear, it steps up to home plate with the softness of cotton and a stretchy fit. The result, then, gives him the best of both worlds: Total comfort and a design built for performance. Loose: Fuller cut for complete comfort. Charged Cotton(R) has the comfort of cotton, but dries much faster. 4-way stretch construction moves better in every direction. Material wicks sweat & dries really fast. 57% Cotton38% Polyester5% Elastane. Imported.