This style is from the Smart Step Collection. The revolutionary smart step polyurethane sole exceeds industry standards for slip resistance and it's reinforced with a hard plastic frame for stability and durability. The design creates a subtle rocking motion that propels you forward while taking pressure off each step and reducing strain to your lower back and legs. The anatomically shaped footbed is engineered for arch support with a roomy toe box. The rocking motion sole allows natural motion from heel to toe, encouraging a healthy stride. There's a full leather insock with no seams at the heel or toe for optimal comfort at all heel heights. It has an easy to clean upper and is approved by the APMA for its standard in arch support and orthopedic construction.