These Doc's Vented Proplugs are the ultimate ear protection for people of all ages! Features include: Developed and designed by a surfing physician since 1977 Doctors recommend Proplugs Prevent swimmer's and surfer's ear Also prevents eardrum rupture Helps divers to equalize Helps ears equalize under water No messy, sticky putty lost in ear canal The ONLY earplug which does not disrupt earwax or obstruct the canal Low price, high quality hypo-allergenic earplug 8 preformed sizes for lifetime protection These wonderful earplugs are a must have no matter type of water sport you participate in!