The mule is all the rage for these upcoming months. Mules have been spotted on Rag & Bone, Donna Karen, and Versace runways. The style, which features an open back and traditionally a closed toe, is perfect for transitioning from colder to warmer months. The classic has been reinvented this season with variety of styles featuring geometric patterns, color blocking, or an open toe design. How do you feel about the mule?