Keen Women’s Whisper Sandal Features: Lace-lock bungee system Contoured arch for midfoot support Eco Anti-Odor for natural odor control Contoured Fit–Follows foot's contours for a more secure fit Women's specific fit Material: Washable polyester webbing upper Non-marking rubber outsole leaves no trace EVA midsole for lightweight cushioning Quick-dry lining for active use EVA insole with arch support for all-day comfort Technologies: Metatomical Footbed Design This internal support mechanism is anatomically engineered to provide excellent arch support and cradle the natural contours of the foot. Weight & Dimensions: Weight: 8.7 oz / 246.6 g Care: Our water sandals are machine washable. Use a small amount of detergent, wash on gentle cycle, and air dry. https://www.keenfootwear.com/p/W-WHISPER.html