Clarion Safety WSS3407-25B-E Outdoor DANGER Warning Sign with 4 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. Non-swimmers should wear life jackets. Reduce the risk of drowning. 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."