You can actually believe this company's advertisement statements and claims,

These are amazing and actually do everything they claim.  My friend was just getting over swimmer's ear.  Getting water from the pool in her ear would have been serious, relapsing with the swimmer's ear (vertigo for over a month, not even able to stand up on her own).  She used these ear plugs and had no problems whatsoever.  I was very impressed. 

Every other pair of earplugs I have ever used works "sort of."  I have never had any other ear plugs be 100% water proof and block out 100% of the sound.  It is hard to believe ads, but I can honestlyu tell you, this company speaks the truth!