Most of them are medical grade and not sold the general public but two are:  Clorox Healthcare Hydrogen Peroxide wipes and Oxivir TB wipes.  Both kill viruses.  Those are the two that I know.  Maybe others know of other options.  I know @twangster has ones too. I don't snorkel but friends of ours that do always bring their own equipment.  I think that is just cause they prefer it.  But yes, anything that goes on your head you think of head lice!  I am "that parent", my kids have a gym bag f