Men's Crocs Classic Evo Clog The Crocs Classic Evo Clog is a men’s slip-on clog designed for casual everyday wear. Ventilation ports across the upper help add breathability and allow room for Jibbitz™ charms, while the pivoting heel strap can be worn back for a more secure fit. The lightweight molded construction and textured outsole support easy wear for errands, downtime, or casual outings.