Waist beads can be worn at all times however, things such as hard water, chemicals and some bath products may cause beads to change or lose color. This is not due to the quality of the beads, but due to the varying quality of the soap and cleansers some people use, as they may be too harsh with detergents and fragrances for the finish of beads. Our beads are made out of glass and we test them before selling them.