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; Additional pair of Comply Canal tips included