Sidi ladies genius 5 fit vernice shoes the soft instep closure system is a wide anatomically curved strap combined with a soft thermo formed eva pad that distributes pressure evenly over the instep area the soft instep closure systemis adjustable from both sides to perfectly center the eva pad over a high or low instep the system eliminates the need for the high instep extender the soft instep closure system is replaceable caliper buckle the micrometric closure called caliper buckle is