Ensure a proper seal and consistent hearing protection with these Howard Leight Cushions Replacement for Impact Sport BOLT. Compatible with both Impact Sport and Impact Sport Bolt Shooting Earmuffs, they form an integral part of the earcups' patented Air Flow Control Technology (AFC), which lets in low frequency ambient sound but protects against high frequency muzzle blast noise. The snap-in design (vs. glue used by many brands) allows for easy changing--a real benefit if an ear cushion gets damaged while shooting and requires quick changing at the range or in the field. Made of durable vinyl for longwearing comfort, the universal size fits all ears.