2.5mmVivos are designed with thin soles to help reconnect you with the ground, and provide flexibility for strong, healthy feet.1.5mmTread depth refers to the thickness of the patterns or "lugs," on the sole. These are purposefully designed to cater to specific surfaces and conditions, providing an ideal combination of traction, grip, and a sense of connection with the ground.Three conductive layers underfoot – a rubber outsole for stability and initial contact, a thin silver webbing for optimal conductive contact, and a leather strobel layer stitched with silver thread – create a pathway for electrons to flow between your body and the Earth's surface. Due to the conductive compound, the sole colour may lighten when damp and darken again once dry; rest assured, this won’t impact performance.Vivos give your feet a chance to feel and the freedom to move, so you can connect to nature and to yourself. Conductive barefootwear enables you to connect on a deeper level – by keeping you in harmony with the natural world, and even closer to your human potential.