My daughter wears one because it speaks for you when you cannot. IE: Car accident parents killed; children survive but unconcious. Paramedics bless the tags, so they know what they can do safely. Friend of mine nearly died in the Drunk Tank at the police station when he collapsed (Diabetic)the Cops thought they could smell alcohol on his breath (acetone) and considered him a drunken sailor... A Medic Alert might have made a difference. Yours, Aye. Dave