Radians Def-Guard 23 passive earmuffs in red, model DF0310HC, rated NRR 23 dB. They are a simple, lightweight earmuff for shooting, hunting, using power tools, mowing and other noisy work. The headband has adjustable slides so it fits all head sizes, and the soft foam-filled padded ear cups sit securely and comfortably over the ears. The design is dielectric (no metal parts), and for very loud environments such as an indoor range they can be worn over earplugs for extra protection. Lightweight and durable, they come in a resealable retail bag.