Keep your little ones safe in any bed with the Universal Safety Foam Bed Bumper by Bluestone. The bumper guard is made of polyurethane foam and features a water-resistant, fire-retardant cover to provide a gentle warning that your child is near the edge of their bed. The cover is also machine washable. The cushion has a semicircle design and non-slip bottom that easily fits under a fitted sheet to keep it in place. The bumper can be used in toddler and twin beds, and even full/queen and king beds.