Propet Voyager Sandals in full and half sizes. Save Big Air conditioned comfort for all summer long. Ahh, let the cool breezes pass through. These Sandals are built to take punishment with traction and extreme comfort in mind. Instep strap easily adjusts to fit. Heel hugging harness comfortably secures your heel. EVA upper and upper lining, synthetic fabric insole, synthetic foam midsole, rubber outsole.