W on the label refers to womens Closed-toe sandal with grosgrain webbing overlays, multiple drainage ports and quick-dry mesh lining EVA foam midsole Premium mesh upper keeps you cool and comfortable, Synthetic upper is durable against wear and scratches Easy hook-and-loop closure comes on and off quickly and gets the fit just right, Plastic buckle closure gets you in and out quickly A lightweight EVA-foam midsole adds extra cushioning for maximum comfort, Nylon shank stabilizes and supports your foot on uneven terrain