Affordable alternatives include a $55 Project Cloud leather clog in taupe with a flat sole, button and seam details, memory-foam insole, non-slip outsole and water-resistant fabric — sleeker than Birkenstock clogs. A $15 Pelbiuqik leather mule offers a shiny finish, contoured sole, easy slip-on backless design and rave reviews calling them "incredibly comfortable and cozy" and a "perfect fit." More options: Qiy Flat Mules, Sunday Walks Knit Mules, Lucky Brand Badri, Ecetana, Stelle Clogs, Steve Madden Pearson and Fudynmalc Mule Flats.