Chaco Women's ZX2 Classic Sandal Boost Black UPPER: Double-strapped polyester jacquard webbing upper wraps around the foot and through the midsole for a customized fit. Toe loop for secure movement. Adjustable and durable high-tensile webbing heel risers. Injection-molded ladder lock buckle. MIDSOLE: Women's specific LUVSEAT PU midsole. Antimicrobial application for odor control. Vegan-friendly construction. OUTSOLE: Non-marking ChacoGrip rubber compound. 3mm lug depth Chaco Women's ZX2 Classic Sandal Boost Black