This A/O floats! The secret lies in its super lightweight and flexible injected EVA upper, which features strategically placed “gills” on the waterline and breathable “portholes” topside to keep feet fresh. Sizing tip: If you're a half size, we recommend sizing down Injected EVA upper Strategically-placed ‘gills’ portholes available in a variety of seasonal colors and designs Textured footbed for all-day comfort Non-marking rubber outsole with molded Wave-Siping™ technology for enhanced traction