The Tirra was designed specifically for a woman's foot in order to provide unmatched comfort and performance in the water. With its unmistakably feminine strap configuration and multiple adjustment options for a secure fit, the Tirra can tackle any obstacle with ladylike grace, just like you. Spider Rubber produces a versatile rubber compound that successfully blends high friction and good durability, whether on wet and dry terrain. The Shoc Pad blended polyurethane/EVA unit in the heel cup evenly transfers the energy of impact throughout the footbed and away from the heel. This energy return then provides greater spring with each forefoot push-off. Enjoy the performance of usually associated with Teva's sandals, but with a little extra refinement.