Bog Vista Rugged zip is made of a 100% waterproof gold certified leather upper with a 1 3/4" heel height. BLOOM eco-friendly, algae-based EVA footbed that helps clean polluted water habitats and has DuraFresh natural bio-technology activates to fight odors. BOGS Max-Wick evaporates sweat to keep feet dry while Rebound cushioning provides all-day comfort and energy return.