As an alternative to the classic round lifebuoy, other shapes of life-saving float are also used on boats. Open horseshoe-type life rings have the advantage that they are easier to put on in the water. Foam life-saving collars keep the wearer above the water even when in an unconscious state. Railing holders for lifebuoys and life collars are available, so that the life-saving equipment is quickly and easily accessible to everyone when a person goes overboard.