the Jefferson is the fearless leader of EVA offering. Encompassing all of the fine features that you woul d expect from a Native shoe - the Jefferson is shock absorbent odor resistant hand-washable and comes in an infinite assortment of colors and treatments. Expect nothing less from the conductor of the lite-weight express. The Native Jefferson is constructed with EVA (Ethylene-Vinyl Acetate) which means they are extremely comfortable durable and washable. The upper has perforations throughout ensuring your feet will stay cool and dry. Plus they are anti-microbial and odor resistant.