360 Sensifit Construction: Wraps the foot in a precise and secure fit; APMA Acceptance: American Podiatric Medical Association; Optimized for Women: Tested by & for women. Specific last, collar shape & sole hardness based on Women's input; EVA Shaped Footbed: Provides excellent cushioning and anatomically designed support; OS Tendon: Provides better rolling and a soft rebound; Non-Marking Contragrip: Unique traction technology provides grip and durability;