Noise Cancelling High-Fidelity Ear Plugs | Earplugs for Concerts and Musicians | Ear Protection For Shooters and Shooting Guns | Discrete, Low Profile | ACES by Black Bullet NOISE CANCELLING FILTER preserves HIFI sound clarity and minimizes the muffled effect of other earplugs. PROTECTS YOUR HEARING from loud noise damage, but STILL ALLOWS YOU TO HEAR OTHERS clearly for safety or collaboration. IMPROVES focus and clarity of thought by cutting out excess environmental noise. TRIPLE RIBBED DESIGN maximizes fit, comfort, and sound reduction. HYPOALLERGENIC silicone molds earplug to the exact shape of ear canal. Wear these earplugs comfortably all day. Offers exceptional hearing protection. 21DB (NRR rating) IS GREAT FOR: concerts, band practice, construction, light industry, sporting events, auto racing, and other loud environments. NOT INTENDED FOR: Swimming or Sleeping. PLEASE NOTE: These are best used in conjunction with earmuffs for INDOOR gun range use. OPTIONAL EXTENSION makes earplug removal easy. Or go for the more discreet option with the extension detached. WATERPROOF BLACK BULLET CASE holds one pair of earplugs either with or without the nub extension. Anodized aluminum construction. Comes with a key chain and a clip so you always have your protection on hand.