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

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

Trimmable to 3/4 length

Unconditionally guaranteed

tactile sensory foundation and adds oscillating electromagnetic and tuneable harmonic resonance elements for the most advanced expression of the Biopods insole platform

Narrow Urban Flex Sneakers - Grey Size:Women's: US 6 Standard Sizing: Fits Women's AIdeal for everyday wear, recovery, and relaxed movement. Standard Sizing: Fits Women's A to AAA and Men's B to C Widths