Otoferm is a greaseless lubricant that eases insertion of ear molds and hearing aids. The silicon base is quickly and safely absorbed into the ear tissue and softens it. This allows an ear mold or hearing instrument to snuggle in and seat very, very well. The result of this is a better fitting that greatly reduces the likelihood of feedback and sore ears. Only a dab is needed, so this five-gram tube will last a long time Imported from Germany.