The pre-filter answers to all that snow that wants to pack down into the pleats of your snowmobile air filter. Melting snow just beads off instead of soaking the filters. Snowchargers are silicone treated polyester wraps that repel snow and water. Offers minimum restriction yet provides optimum airflow for increased engine power. Easy to clean and return to service.This product wraps your air filter with an additional pre-filterDesigned to protect filter from snow and minor water splashDurable silicone treated polyester material with stitched elastic openingsWater repellent treatment typically lasts 1 to 2 yearsSpecificationsWrap Type SnowchargerColor BlackMaterial Used Silicone Treated PolyesterBase Inside Diameter 4.5 in (114 mm)Top Inside Diameter 3 in (76 mm)Height 4 in (102 mm)Closed Top YesPackage Contents 1 SnowCharger WrapAir Filter Shape Round Tapered