NON-REMOVABLE INSOLE. Shine in warm weather style with the Hubilia sandals from Mephisto. patent leather in a casual sandal style with a round, open toe. Toe loop detail at the toe. Asymmetrical instep strap. Wide elastic stretch instep strap. Leather lining, cushioning insole with Air-Relax technology. Cork midsole. Rubber traction outsole, 3/4 inch heel.