* Removable advanced acoustic filters * 100% allergy-free soft organic material * Includes two universal plug sizes for customizable comfort and fit  * Optional use detachable 60cm leash * Optional use detachable leash clip Block the water but not the sound with the new Northcore Surfshields Surfers Acoustic Ear Plugs! Northcore constructed this plugs that is specifically designed for surfers; it block out water while allowing in sound for optimised surfing balance, equilibrium and protection.