The ultimate barefoot shoe 5-toe slots designed to align toes and allow them to fully articulate Zero-drop sole Exceptional grip on all surfaces: wet or dry. Strategically placed rubber treads at critical anatomical wear points. The specialized Super Critical EVA midsole and strategically placed rubber treads at critical anatomical wear points provide exceptional grip on all surfaces, wet or dry. The zero-drop, flexible sole contains just the right amount (9 mm stack height) of cushioning for comfortable, all-day wear across a variety of activities.