NWT Crocs Women’s Alice Work Slip Resistant Slip-On Shoes in Black, Size 8 Relaxed Fit These slip-resistant Crocs™ feature a Croslite™ material footbed and are designed for customers looking for enhanced arch support to relieve pressure on the feet, legs, and back to ensure comfort. Designed to meet workplace standards with a closed heel, these black slip-on Crocs have ASTM Crocs Lock™ tread for slip-resistance on wet, dry and contaminated conditions. They also are easy to clean with simple soap and water.