Popular by many who engage in various water activities to keep moisture or water out of their ears.  Custom made swim earmolds provide a snug fit to ensure your outer ear canal remains dry.  When showering, they also provide protection for ruptured eardrums or for ears with pressure equalization tubes.  A slightly different model is used as a precaution to decrease the likelihood of "surfer's ear" and "swimmer's ear".  If you love the water then this may be a product to consider.  *Aquatic earmolds are not to be used during scuba diving or as protection from harmful levels of noise!