Arcopedico Women's L14 Slip-Ons - stretchable comfort that won't bind or lose its shape Arcopedico, known for its revolutionary stretch upper, introduces this casual slip-on made with Lytech, a polyurethane bonded spandex that offers a perfect stretch around your foot. The upper has a leather-like finish that you can polish for shine or throw in the wash! For less foot fatigue, the lightweight, flexible polyurethane outsole is built with twin arch supports. And, unlike foam footbeds with arch support, the outsole will never break down, so you get long-lasting support that cradles your feet. Great for packing and traveling-a must for your next vacation! Click here to view a detailed diagram of Arcopedico's anatomical footbed with longitudinal and metatarsal arch supports.