Dual-Layer Protection for Maximum Performance The Twin Air Foam Air Filter is a revolutionary dual-layer design that delivers exceptional airflow and unparalleled engine protection for motorcycles, ATVs, UTVs, quads, and side-by-sides. Born out of necessity in the sandy terrain of the Netherlands, this filter combines innovative engineering and premium materials to meet the demands of off-road enthusiasts. Key Features: Fused Dual-Layer Design: Combines coarse, open-pore outer foam to capture dirt, grime, and sand with fine-pore inner foam that traps even the smallest particles while maximizing airflow.