Walker's Hearing Razor Series Slim Shooter Folding Muff GWP-RSEM-FDE Flat Earth Two Omni Directional Microphones - NRR23dB - HD Sound Output - Ultra Low Profile Rubberized Cups For over 25 years Walker’s has developed innovative solutions for hearing protection & enhancement. The Walker’s line of products are widely considered the industry standard for shooting protection and safety. With the introduction of advanced digital circuitry & nano tech water repellence, Walker's continues to raise the bar.