Blox Music Earplugs are auditory protections with a patented acoustic filter? guaranteeing a high fidelity (HiFi) resititution of music.<br /><br />They are especially designed for listening live music (concerts? festivals...). They canbe worn with a string? to keep them close if they fall. They guarantee a linear reduction of sound (-18 dB)? while preserving sound ans music quality.<br /><br />They have 3 supple collars for a great comfort of use? and in all discretion thanks to the transparent tip.