Clarion Safety WSS3311-21A-E Indoor DANGER Warning Sign 3 Symbols - This sign reads: "Watch your children closely. Drowning happens quickly. People drowning cannot call out for help. Keep children within arm's reach when in the water. No diving. Reduce the risk of head, neck and spinal injuries. Only enter water feet first. No long underwater breath holding. Prolonged repetitive breath holding can be deadly. Doing so tells your body not to ask for oxygen, which can cause you to pass out and drown."