Over 50 years ago, the sandy, gritty soil of The Netherlands – and the resulting engine failures – proved that single-foam and paper filters gave riders air flow, but failed at protection. Twin Air’s breakthrough, fused-dual-layer design (now widely copied) combined performance and protection. The fused layers of open-pore foam and fine inner foam trap even the smallest particles. The new, rounder design boosts airflow. So do the minimized seams made possible by a revolutionary micro-gluing process: shorter seams = more foam = more flow. Features: * washable and reusable - reusing a Twin Air filter 30 times is common * dual-layer foam made to Twin Air specifications, with cells that are evenly sized and distributed * minimized seams made possible by a revolutionary micro-gluing process * greaseless sealing ring * assembled by hand and inspected for a perfect fit * packaged in a resealable and reusable bag * important! Air filter comes pre-oiled so it can be used immediately
