Mephisto Will PerfYour slip on and go go to has arrived. The Will Perf perfects the concept of a comfy mens slip on a look thats both immediately recognizable and unique enough to set off any warm weather ensemble. This is the basics done right: clean looks, immaculate materials, impeccable build quality. Oh, and of course theres the legendary Mephisto comfort. Perforations throughout the upper work with our AIR JET technology for a wearing experience thats literally a