Protection: super tacky, annoyingly sticky & amazingly good at stopping dirt! Performance: increased air flow due to Micro-Flo technology: Air Flow = Pressure Resistance We increase air flow, and thus horsepower, by decreasing the resistance of the air traveling through the foam air filter. EZ Cleaning: cleans in seconds with water and No-Toil Cleaner Biodegradable & Non-Toxic: will not harm the environmen Waterproof: will not remove from filter with water alone Save $$: filter cleaning and re-oiling costs less than $2 (includes cost of filter!)