Biopods Resonance begins with the Catalyst Model's dynamic

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

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

Use only with shoes that HAVE removable insoles

Barefoot Science® 6 Step System Biopods Bamboo Ankle Socks Biopods Resonance begins with theFor reduced muscle fatigue, improved static and dynamic balance, and relief from sore feet. The 6 Step System comes with 6 interchangeable inserts, which allow you to customize how Barefoot Science works best for you for reduced muscle fatigue, improved static and dynamic balance, and relief from sore feet. For all activities: walking, running, and standing. Comfortable, safe, and easy to use. Helps alleviate foot, leg, hip, and back problems.