Kalas Aero shoe covers Passion Z4

The PASSION Z4 Aero overshoes represent a complete redesign of our aerodynamic shoe covers. The revised pattern ensures a tighter fit to the shoe, offering better aerodynamic benefits. To ensure that the upper stays in place throughout your run, we have changed the shape and added a double grip. We also recommend revising how these overshoes are put on. Put the overshoe on before the shoe and pull the overshoe beyond the ankle. Then, slip on the shoe and pull the overshoe down over the top of the shoe.