D. O. T. Approved - New Youth Sizing; SM, MD, LG and XL - Advanced Polycarbonate Composite Shell: Revolutionary design with unique visor. Lightweight, superior fit & comfort using advanced CAD technology. - Advanced Ventilation System: Full front to back airflow flushes heat and humidity up and out. - Nylex Interior: Removable and washable. - All sizes of cheek pads are interchangeable within all sizes - Large Eye Port and maximum range adjustable visor: For maximum visibility and superior goggle fit.