ProGuard Budportz are generic earmoulds to provide a superior fit of Walkman ('bud') style earphones into the ear. They also provide a degree of noise attenuation; this will depend on the integrity of the fit. Made from soft silicon, they are comfortable to wear and simple to clean, using warm water.
It's extremely simple to fit the earphone into the mould, they just press into place. The earmoulds generally fit most of the standard style of ear-bud phones with a diameter range of around 14-17mm. Supplied as a left + right pair.