Available Sizes: L (56-62 cm/22-24.4inch) Ventilation: 25 Wind Tunnel vents with internal channeling Active safety technology: extended rear protection Inner shell: Fushion in-mold polycarbonate shell Comfort : anti-allergenic interior padding;hand washable,Eco-leather chin strap Color Range: 9 different colors; Customzied color and design are acceptable Outer shell construction: (intergral inmoulding)in-mould;in mold poly-carbonate shell with Fit system: Lightweight fit system with an easy-to-turn rubber overmolded dial for adjustments Visor: adaptable visor system accommodates both goggles and glasses and works with or without the visor attached,flexible