Feature●Constructed with three layers of impact-grade ABS material and high-density, impact-absorbing, contour comfort foam for maximum protection and comfort●17 sleek ventilation portals for increased air flow●DuraVent Universal Jaw Guard included for added jaw protection for either side of helmet●Laminated, moisture wicking liner and fully wrapped ear pads keep you cool, dry and comfortable●One size fits most: Senior (7⅛ - 7½) & Junior (6½ - 7⅛)Description Constructed with multi-layered, impact-absorbing contour comfort foam and universal jaw guard, the Marucci DuraVent Batting Helmet provides maximum protection at the plate and is NOCSAE/SEI certified. With 17 sleek ventilation portals for increased air flow and moisture wicking liner, the DuraVent helmet not only keeps you protected, but also cool, dry and comfortable.