The Hydro Moc All-Terrain System is an evolution of the splitting Hydro Moc, taking it out of the water and into varied environments. All models use the same design system, defined by a super-strong, water-friendly EVA foam cage upper. This sockless iteration is created from an 80% recycled nylon upper, a BLOOM® performance foam midsole made with 10% algae biomass, and an external heel strap that locks the heel , with a toggle lace-up closure providing the wearer with easy on and off functionality.