Bern Helmets Lenox EPS The Asteroid and Meteoroid fit all new and older Bern helmets with a two-hole mount located in the rear of the shell. Premium Boa dial adjustment system integrated into our standard helmet comfort liners. Our tried-and-true technology, ThinShell is the ultimate balance between hard ABS or polycarbonate shell thickness and interior EPS foam thickness. Safe, durable and strong.