Marc1 Windscreen. Zero Gravity's series of performance windscreens takes its inspiration from the screens used at the top level of MotoGP. The Marc1 Series is engineered with styling and performance like those MotoGP bikes designed for maximum aerodynamic edge and aggressive, weight-forward riding style. If you're looking to squeeze every bit of aerodynamic advantage out of your bike with maximum buffeting protection while head down and pushing for the win, the Marc1 Series of windscreens is for you. Engineered with styling and performance like MotoGP bikes. Designed for maximum aerodynamic edge and aggressive, weight-forward riding style. Squeeze every bit of aerodynamic advantage out of your bike with maximum buffeting protection while head down and pushing for the win.