Our 20-pack of crib slat bumpers is the PERFECT answer to that nagging question keeping parents up at night??to bumper or not to bumper?? Our patent-pending crib slat bumpers offer the protection of a standard bumper while allowing airflow ventilation in and out of your crib. This creates an oxygen rich environment for your buddle of love. Medical research has shown that the more oxygen surrounding your baby during sleep, the safer your baby is from suffering from the unthinkable?SIDS. Each crib slat bumper measures 10 inches x 5.5 inches with 9 inch ties. 100% minky polyester and 100% satin polyester. Machine washable. Imported.