Our 1540v3 is kitted out with technology that helps deliver mile-after-mile stability and combat overpronation. It's made with two layers of performance foam that offers superior support and a soft rebound. Designed with an ENCAP and Rollbar midsole technology, this runner offers rear foot movement control for feet on runs from 5K and beyond. Medicare/HCPCS code = A5500 diabetic shoe. Differential: 10 mm. Designed for the severe overpronator who requires a combination of maximum stability and cushioning. Mesh and synthetic upper materials provide a combination of breathability and structural support. No-sew upper application for added comfort and a reduced likelihood of irritation. Plush tongue and collar. Dual-density foam at the collar for a great in-shoe feel. Soft fabric lining offers next-to-foot comfort. Removable foam footbed.