Chaco Women's Z/Volv X2 Sandals - Dash Black | Size 11 Chaco Women's Z/Volv X2 Sandals that features, and an airy PU compound that's softer underfoot and 20 percent lighter than our Classic Z sandals, the Z/Volv X2 is the ultra-light sandal you've always wanted. Size 11 Worn Once!