Crocs Bistro clog uses a distinct tread design, Crocs Lock, provides slip resistance that exceeds industry standards. To further protect your feet at work, these clogs have an enclosed toe and heel and a thicker metatarsal area. Of course, we didnÃ¢ÂÂt forget about comfort. Crocs Bistro shoes are made with enhanced Croslite material. These shoes give you a custom fit by conforming to your feet.