Because they are made of breathable perforated leather

Lining: 100% polyester

Specialist in the Manufacture of High-Performance Sealing Components and Bearings

which allow you to remain visible even after darkness falls

25 | Inner_diameter: ø 115 | Number_of_holes: 6 | Outer_diameter: ø 245 | Thickness_mm: 5 mm

TRASK AIRCLEANER ASULT TBW RC TM-1020RC suzuki-an-400-burgman-400-2009-esi5491298 Because they are made ofFeatures a Billet Aluminum Backing Plate With Hidden Integrated Breather System and a Plexiglass Outer Cover, Snap in Velocity Stack for Improved Airflow, Dyno Developed and Tested, High Flow Air Filter Is Reusable; Just Clean and Re Oil, made in the USA