Radians Def-Guard Hearing Protection. OpticsPlanet Inc is an Authorized US Distributor for Radians Hearing Protection. Radians Def-GuardFeatures: Adjustable headband slides to fit all sizes. Foam filled padded earcups fit securely and comfortably over the ear. Lightweight and dielectric. Durable construction. NRR 23 We offer a complete line of Radians Hearing Protection. For our full selection of products by Radians on sale please visit our Radians page. For more Shooting Glasses please visit our Hearing Protection store section. Specifications for Radians Def-Guard Hearing Protection: Manufacturer: Radians Color: Red/Black NRR: 23 dB Quantity: 1 Pair Additional Features: Over the Head Package Contents: Radians Def-Guard Hearing Protection Radians Def-Guard Hearing Protection