Moving a toddler out of a crib usually means one bad night and one fall. A 17-in rail height on this gray guard keeps a small sleeper on the mattress through that transition, and nothing drills into the bed frame. The rail pivots down when it is not needed, so daytime bed making stays simple. Padding wraps the metal core along its full 47-in length, the cover strips off for a wash, and the 5-lb rail fits any mattress at least 2.4-in thick. Certified to ASTM and CPSIA standards.