Protective cups and jock straps are worn under an athlete's uniform as part of the base layer of their underwear. The cup
is primarily for supporting and protecting a boy's testicles or genitalia. Cups are recommended equipment for just about any sport your son plays which involves a puck, a ball, or possible collision or contact with another player, explains MomsTeam's Brooke de Lench in this informative video.
There are three kinds of mouth guards, but, regardless of type, they help prevent injury to the mouth, teeth, lips, cheeks and tongue. But they are also breeding grounds for bacteria, so they should be sanitized daily.