Pure, uninhibited barefoot-like comfort. Free your soles with the Ultra Pure L from Vivobarefoot! ; A barefoot-inspired running shoe. Ideal for running in wet and dry conditions. Features the same single-unit upper as the Ultra, without the removable sock. EVA 3D upper is made of a soft, perforated, non-toxic, dual-density, high-abrasion resistant EVA (Ethylene Vinyl Acetate) . Bungee lacing allows for quick, secure lacing. Soft, amphibious, high-abrasion injected EVA outsole delivers lasting durability and traction. Outsole Thickness: 7mm. Outsole compresses to 3mm over time. 100% vegan-friendly construction. Measurements: ; Weight: 4 oz ; Product measurements were taken using size 40 (US Women's 9), width B - Medium. Please note that measurements may vary by size.