Vionic Women's Splendid Midi Perf Slip-On Sneakers Color: Gray Size 10 Pre-owned. Great condition. With the Midi Perf cupsole sneaker, casual has never looked so good. This slip-on features a perforated leather upper and twin gore panels for all-day walkability. Leather uppers. Firm yet flexible, removable microfiber-covered EVA orthotic insert. Durable rubber outsole. Biomechanically designed to hug your arches, Vionic orthotic technology helps support natural alignment from the ground up.