Koss QZ-77 Active Noise Reduction Ear Plug System

Reduces harmful and annoying low frequency sounds in noisy environments

Specialty ear cushion material forms slowly in ear canal providing a custom fit and maximum isolation

Dynamic stereo phone element for extended frequency response (10 - 20,000Hz)

Reduces harmful and annoying low frequency sounds in noisy environments

Specialty ear cushion material forms slowly in ear canal providing a custom fit and maximum isolation

Dynamic stereophone element for extended frequency response (10 - 20,000Hz)

Compact design for convenient travel and portability

Ideal for in-flight use