Twin Air Filter Skins, probably the best solution for motocross and enduro riders.  A cleaner air filter provides more power and helps towards a longer life of the engine, also service intervals on the filter becomes less.  This universal Skin fits virtually over all air filters on the market, and installation is simple, just slip it over your regular filter.
The skin acts as an extra layer of protection, for when you are riding in sandy or dusty conditions. When you have finished riding you can easily just pull the skin off and presto you have an air filter that is as clean as a whistle. The skin captures 90% of dirt and dust. 

USD : 11.55