What do canvas slip-ons want to be when they grow up? The Timmons Slip-On, a refined update to the classic style that’s crafted from fine nubuck leather. Combining winter-ready warmth with modern style, they feature an eco-friendly vulcanized construction that eliminates the need for adhesives. KEEN.Cush PU and memory foam footbed molds to your feet and makes every step a cushioned one.