Features: -Extra lite -Shock absorbent -Odor resistant -Hand-washable -BPA and phthalate free, and do not contain hazardous materials such as formaldehyde or formamide. Materials : -Rubber Rand and Toe -Injection Molded EVA Construction -The technical name is ethylene-vinyl acetate. This material naturally molds to your feet, giving each step a cool and cushy feeling. The EVA shoes are lightweight, shock absorbent, hand-washable, and odor-resistant. How to care : EVA shoes can be hand-washed using mild soap and baking soda. Wash with a cloth or soft brush and let dry in a cool shaded area. Never put your shoes in the washing machine, dryer, or dishwasher! EVA shoes are heat-formed, so they can be heat-deformed. Native advise to store shoes away from direct sun or heat, as they can warp due to the EVA composition. Native also advise against leaving them in hot cars.