Skulltec Advanced Gel Cap is a new and innovative safety product that fits comfortably under any sports helmet and lessens physical impact drastically! The cap is lab-tested, doctor recommended, universally recognized, and easily washable. It has been tested for comfort, fit, and protection. The Skulltec Advanced Gel Cap looks good, feels good, and actually works. At Skulltec Sports Gear, safety is, and will always be, the main focus. Skulltec is a new and innovative product proven to reduce impact to the head up to 25%. It can be worn under any helmet or individually. Material: Spandex, Nylon Blend Impact Material: Patented Gel, made out of 100% natural soy beans. Color Options: Black (Assorted colors available soon!) Cap Sizing: Youth - 6 1/4 to 7 3/4 Adult - 7 1/4 to 8 1/2