The Speed and Strength SS1550 Off The Chain motorcycle helmet is built with an A.T.P.A. Advanced Thermo-Poly Alloy shell that meets or exceeds DOT standards. The helmet fits an intermediate oval head shape and allows for the interchanging of liners and pads within sizes S-M / LG-2XL. The liners/pads are moisture wicking to help with sweat management and are completely machine washable. The SS1550 comes with both a clear and dark tint All Clear face shield and is equipped with a Lock 'n Load shield replacement system allowing for a quick conversion from clear to tint, or vice versa. The Air Strike direct course ventilation system features 5 closable intake vents and 6 exhaust vents allowing for the free flow of air when you need it. The helmet comes with an integrated chin curtain to reduce wind and includes a breath guard for added fog protection.