Foam rubber that smoothly slows down the airflow into your GPX 5.5/6.5 as it starts to get colder outside Fits for helmets: Leatt GPX 5.5 Composite V19.1 MOTOCROSS HELMET Leatt GPX 5.5 Solid MOTOCROSS HELMET Leatt GPX 5.5 Composite V15 MOTOCROSS HELMET
