Zero Gravity Sport Tour Windscreen Smoke for Ducati ST3 ST4 Designed to reduce the windblast on the sport touring rider and provide more comfort while in the upright riding position Raise the point at which the wind hits the rider by several inches to significantly reduce the windblast Buffeting and other aerodynamic considerations will vary according to the riders physical dimensions Made to the highest Zero Gravity standards, each Sport Touring screen is designed to enhance the look of the bike as well as provide better rider comfort