Standard Sizing: Fits Women's A to AAA and Men's B to C Widths

Trimmable to 3/4 length

Wide Width: Fits Women's D to E and Men's EE to 4E

The 4 Step System comes with 4 interchangeable inserts that allow you to customize how Barefoot Science® works best for you – for reduced muscle fatigue

Next Generation Stimsoles® Insoles Standard Standard Sizing: Fits Women's ATransforms your shoes into a therapeutic exercise program for your feet. For all activities: walking, running, and standing. Comfortable, safe, and easy to use. Improves foot, leg, hip, and back problems. Clinically tested and doctor recommended. Unconditionally guaranteed.