Premium material: 4.5" thick high-density foam provides a soft touch to kids while also being firm enough to prevent them from falling off the bed. The washable cover is made of environmentally friendly silicone non-slip bottom and snug top-quality fabric. Installs in minutes: So simple to use! The bed bumper which has rebounded to its original shape is placed on the mattress. Finally, cover the sheets. Comfortable & friendly: The bed bumper is the ideal transitioning tool for graduating your toddler from crib to bed. If a child gets too close to the edge of the bed the bumper serves as a ‘passive safety’ reminder to get back to the center of the bed. We designed our bumper with firm foam so that it is difficult for a child to roll over it, yet still soft to the touch and easy to purposefully climb over. The bumper will give your child the sense of security needed for a good night’s sleep.