The TYR® silicone ear plugs are designed to reduce the risk of water and cold air entering the auditory canal during swimming, bathing, or showering. They are soft and reusable, and this pack of four includes a storage case.
Ear plugs are reusable and work reasonable well under a bathing cap. I am not certain they would stay in as well if I did not have the cap over my ears. They are keeping water out of one ear very well and work reasonable well in the other ear. I am uncertain why this is. They are allowing me to swim comfortably.