Seal out noise with a noise reduction rating of 27 decibels (highest ever for a flanged earplug); Exceptional ability to seal out water; Super Soft Seal Rings – Incredibly soft for extreme comfort; Detachable Cord – Convenient for hanging plugs around your neck in environments where noise comes and goes. Quickly and easily remove the cord for water activities. Washable and reuseable. One pair. Reusable, washable, with removable cord.