Biopods® Resonance Tunable Harmonic Insoles Size:M - US Mens: 8 - 9.5 Biopods Catalyst is the core

Biopods Catalyst is the core model in the new Biopods insole family

Biopods Resonance begins with the Catalyst Model's dynamic

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

The 5 Step System comes with 5 interchangeable inserts that allow you to customize how Barefoot Science® works best for you – for reduced muscle fatigue

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

Biopods® Resonance Tunable Harmonic Insoles Size:M - US Mens: 8 - 9.5 Biopods Catalyst is the coreBiopods Resonance begins with the Catalyst Model's dynamic, tactile sensory foundation and adds oscillating electromagnetic and tuneable harmonic resonance elements for the most advanced expression of the Biopods insole platform. Use only with shoes that HAVE removable insoles. Now available for pre order. Expected to ship late August.