Holeys Proline Clogs are a well designed shoe for working purposes due to comfort and performance especially in places where slipping is a concern. Product features technically advanced closed cell polymer foam. Incorporated in their products is SmartCel memory foam to provide comfort, improved support and resiliency. Additionally, all new footwear models produced include Sole-tek Holeys' slip-resistant thermo rubber sole for increased stability and durability. The PROline clog has been tested and exceeds OSHA guidelines for slip resistance. They are recommended for professional environments such as hospitals and restaurants. Dishwasher safe for cleaning!