This breather also protects your engine from dust and foreign particles. Filters are Polyeurethane foam which has a high dust capacity. 97% of the volume is air space, gining it enormous dust retention capacity. Etched strands provide for depth loading and arrestance of dust up to twice the weight of the foam pad itself. They are also easy to clean and resist most common detergents and solvents. So tough that it can be handled without special care. Can be wrung dry and ready to use again within minutes.
