Reduce dangerous noise levels while allowing safe-level ambient sounds and conversations to be heard * Comply Canal Tips provide secure seal and, together with Hocks Noise Braker filters, provide a 28dB NRR (with stoppers in) * Patented, ergonomic Ear Lock by Surefire retention ring ?locks? earplug in place * Cleanable and reusable for up to 6+ months (For optimal performance, Comply Canal Tips should be replaced every 2 - 4 weeks.) * One pair of replacement Comply Canal Tips included with earplugs