Because the leather bracelet uses dyed leather and is finished with an adhesive, it should not be fully submerged in any liquid. (A little water from hand washing or rain, etc., won’t hurt it—but do not bathe or swim while wearing it.)
To clean, simply rub these bracelets with a jewelry polishing cloth to keep the silver bright. The maker recommends holding one end and pulling it through a folded cloth a few times in either direction.
Or just enjoy the changing patina as time goes by.