Our jewelry is 18K Gold Plated, which means yes they are water and tarnish resistant! They are perfectly safe to wear in the pool/ocean swimming etc. They are also great for working out and resistant to sweat. However we do not recommend wearing them to shower daily as the chemicals in soaps could eventually deteriorate or affect your jewelry over long terms. Also avoid spraying sunscreen/perfume directly onto jewelry. You can polish your jewelry with a micro fiber cloth to keep it shiny between wears.