Vionic Randi Women's Orthotic Leather Sandal Slides Size 7.5 Medium. These sandals are in great pre owned condition. Randi's perfect for poolside glamour or a night out. Our classic slide-sandal gets an upgrade with a feminine, perforated pattern. Leather upper with microfiber-covered footbed. Lightweight, flexible EVA midsole absorbs shock, reducing stress on feet, ankles, and knees. Durable rubber outsole with a patterned tread provides traction on a variety of surfaces. Vionic Technology is biomechanically designed to hug your arches and support your feet in comfort. Vionic sandals' built-in orthotic is shown to be effective in helping to treat heel pain (plantar fasciitis).