28dB Noise Reduction Rating (NRR) with filter caps inserted Lowers potentially dangerous noise levels above 85dB Hear safe sound levels (with filter caps out) as if you weren't wearing ear plugs Patented EarLock retention rings utilize seven contact points to lock earpieces in place and fit the same way every time Soft memory-foam Canal Comply Tips provide secure seals in ear canals and all-day comfort Made from hypoallergenic, medical-grade polymer that's soft, comfortable and durable Low-profile design allows you to keep them in place while wearing a mask, helmet, hat, or while using phone, headphones, or supplemental hearing muffs Serve as earpieces for compatible radio communication systems 26' polymer lanyard included