Using advanced construction techniques, this easy on / easy off shoe is more durable that others of its kind--for days spent in and around water. Features: Water-friendly EVA foam upper for a lightweight flexible fit and ease of cleaning External translucent rubber rear sling with10% recycled rubber fleck locks in the heel BLOOM® performance foam is made of algae biomass, transforming green water into clean water in the process Vegan-Friendly Half pair weight: 0lbs-6.17oz, 175g