Our newest helmet design, the B6 Batting Helmet is constructed with a durable ABS plastic shell and an EVA Foam inner core for superior protection and interior comfort. DryliteA(R) liner helps control moisture.Sizing Recommendation: S/M: 6 3/4" - 7 3/8". L/XL: 7 3/8" - 7 7/8". Constructed with a durable, lightweight ABS plastic shell. Designed with an innovative Honeycomb Shell pattern to lower helmet weight, while providing high-level protection. EVA Foam inner core provides superior protection and interior comfort. DryliteA(R) liner helps control moisture. Meets NOCSAE standards.