XP Defender offers you one of Axil’s most innovative ear plug solutions with two hearing modes. Valve open, you’ll hear sounds clearly and naturally, when loud sounds hit, the Dynamic Mesh Filtering System™ will screen those sounds protecting your hearing. Valve closed for total hearing protection. The XP Defenders are small, handy, and can go anywhere with you. Perfect for Outdoor and Indoor Activities of All Types; Fitness, Cycling, Hiking, Stadium Events, Tactical, Auto Racing, Shooting, Hunting, Concerts, Musicians, Night Clubs, Industrial, Construction, Motorcycling and more.