Made of flame-laminated dual-layer foam bonded with the highest quality glue to stand up to the roughest and toughest of riding styles and terrains, For use in riding conditions that are so extremely dusty or sandy that added protection is needed, Slight reduction in airflow possible, however dirt-stopping capabilities greatly increased, Use with No-Toil filter treatment for superior protection and ease of cleaning, Heavy-duty glue and soft seams, Wide sealing ring