Standard Width: Fit Women's A to AAA and Men's B to C

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

which allow you to customize how Barefoot Science® works best for you – for reduced muscle fatigue

and relief from sore feet

Improves foot

Barefoot Science® Dynamis Sensory Insoles Biopods Bamboo Dress Socks Standard Width: Fit Women's AInterchangeable inserts allow the user to personalize the arch stimulus strength and choose the sensory experience that feels best. The full length version features 7 stimulus levels via 6 interchangeable inserts. The 3 4 length version features 6 stimulus levels via 5 interchangeable inserts. Now available for pre order. Expected to ship late August.