Many current FPV racing events use marker flags as well as DIY FPV racing gates, Designed for FPV racers, they are extremely visible and durable in the wind and provide excellent visual references at your local FPV Track/Course.. these gates are made from prop resistant fabric . Framed with durable heavy-wall fiberglass pole. All marker flags are easier to set up and wide ranges of bases you can choose to use on soft or hard ground.