Kid Kusion Xtra Wide Gummi Crib Rail is meant to be used on the crib rail and is especially designed for teething kids. It provides a safe, chewable surface. Installing the gummi crib rail is very easy as it has an adhesive back that attaches on metal and wooden cribs easily. It's safe and is meant for use with wider cribs and can also be used for headboards and footboards. Cleaning it is easy; simply wipe it with soap and water.