Free Overnight Shipping - The Elixer is not your ordinary flip-flop. Built with comfort and support in mind, this sandal is a complement to any adventure and is the perfect everyday adventure footwear. Waterproof suede and breathable air mesh upper. Microban zinc-based, anti-microbial protection. Encapsulated Shoc Pad in the heel. Compression molded EVA midsole. Traction Rubber outsole. Shoc Pad : ; A blended polyurethane/EVA unit in the heel cup that evenly transfers the energy of impact throughout the footbed and away from the heel. This energy return actually provides greater spring with each forefoot push-off. Sandals, Walking.