Twin Air Alternative foam air filter 7239718

TwinAir foam filter More than 40 years ago, the sandy and gravelly soils of the Netherlands - and the resulting engine failures - proved that foam and paper filters allowed riders to have airflow but did not protect them. Twin Air's innovative design, combining two layers, blends performance and protection. The fused layers of open-cell foam and fine inner foam trap even the smallest particles. The new, rounder design increases airflow. This also applies to the seams reduced to a minimum, made possible by a revolutionary micro-bonding process: shorter seams = more foam = more flow. - with fluid, backfire-resistant foam, laminated inside the filter - washable and reusable (40 to 50 times is common) - two-layer foam (manufactured to specifications with cells of equal size and distribution) - high quality (hand-assembled and checked for a perfect fit)