Oliver B"s Geo-Cricles Crib Sheet Collection adds a modern and sophisticated touch to your nursery. Create a designer look by pairing with Oliver B"s Ventilated Slat Bumpers 20-Pack and Oliver B"s Pure White Flat Panel Crib Skirt. For use with standard size mattress. Machine wash; tumble dry - low; warm iron, 100% Cotton. Oliver B is a modern and vibrant baby bedding company, but with a mission unlike any other: saving infant lives. Oliver B"s patent-pending Ventilated Crib Slat Bumpers provides complete airflow into the crib, thereby decreasing the risk of Sudden Infant Death Syndrome (SIDS), the leading cause of death of infants less than 1 year of age. Made of ultra-soft and breathable fabrics, Oliver B bedding showcases bright colors, modern luxury and an eco-friendly focus and frequently uses all-natural bamboo fabrics.