Koss QZ-77 Active Noise Reduction Ear Plug System

Reduces harmful and annoying low frequency sounds in noisy environmentsSpecialty ear cushion material forms slowly in ear canal providing a custom fit and maximum isolationDynamic stereo phone element for extended frequency response (10 - 20,000Hz)Dynamic stereophone element for extended frequency response (10 - 20,000Hz)Compact design for convenient travel and portabilityIdeal...