Shellshock Protection EXO Passive Protective Ear Muffs 23 dB Pair of 1 Black. Protects against loud noises such as gunshots while maintaining all-day wearability. Specifications for Shellshock Protection EXO Passive Protective Ear Muffs: Manufacturer: Shellshock Protection Color: Black NRR: 23 dB Quantity: 1 Size: One Size Features of Shellshock Protection EXO Passive Earmuff 4C30FADA Passive noise reduction All-day comfort design Lightweight construction Universal fit Foldable for easy storage Package Contents: Shellshock Protection EXO Passive Earmuff 4C30FADA Shellshock Protection EAR-EXO-PASSIVE: EXO Passive Protective Ear Muffs 23 dB Pair of 1 Black