When you find yourself in a sudden down pour, help prevent water from entering your engine with RSD's Pull-Over Rain sock. Stash it in your backpack or pocket and when the skies open, stretch it over your complete RSD air cleaner for quick and easy roadside installation. No tools required. The Pull-Over Rain Sock is compatible with all RSD Venturi and Turbine air cleaners. It is made from a durable polyester material and has been factory treated using a hydrophobic process to repel water.