Crocs Swiftwater Wave Athletically inspired. Ambitiously feminine. Amphibiously functional. Our most active, water-friendly shoes to date feature siped outsoles to channel water away and improve traction. Fastening:Slip-On Material Composition:Other Materials/Other Materials/Other Materials Functional yet feminine style. Water-friendly, lightweight TPU uppers. Slingback style for a secure fit. Cutouts allow water to drain away. Outsole with flex grooves for easier range of motion.