Zappos.com is proud to offer Instride - Women's Athletic: InStride is a footwear brand that meets the medical needs of those with specific footwear problems such as those related to diabetes, but who are not willing to sacrifice form for function. Instride offers a complete line of Medicare reimbursable therapeutic footwear that includes athletic, casual, and post-operative shoes. The three-layer Custom Fit System (CFS) allows each wearer of InStride shoes to experience a perfect fit experience, even with an orthotic device.