The men's Olukai Kalo sandal feature a soft and thick custom jacquard webbing with an antique full grain overlays with a jersey knit lining and neoprene backer. An anatomical compression molded EVA midsole with a full grain high character leather drop-in footbed for a more personalized fit. And a non marking rubber or gum rubber outsole with a coral reef lug design for an added grip.