2nd Skull Protective Skull Cap Polyester Made in USA Thin fabric features spandex for a stretchy compression fit. Integrated technology for impact absorption. Moisture-wicking design sweeps away sweat. Antimicrobial finish. Acceptable for wear under football, baseball, hockey and lacrosse helmets; also designed for BMX, skateboarding, skiing, snowboarding and more. Hand wash. Sizes: Youth (19"-21"); Teen/Adult (21"-24.5"); Extra Large (24.5"-26"). Made in the USA.