The Zero Gravity Double Bubble � has changed the face of the sportbike industry. This innovative �bubble within a bubble� concept was pioneered by Zero Gravity � and has pushed modern day race bikes to their peak performance level. From our first inception of a performance windscreen the Double Bubble � , is Zero Gravity�s version of the now popular �stepped profile� design, pioneered by Zero Gravity Racing in the mid-90�s. Sculpted to the sport bike�s distinctive futuristic lines, the Zero Gravity � Double Bubble � enhances the bike�s race look while providing added aerodynamics. Inventory available in Clear, Light Smoke, and Dark Smoke.