adidas Performance Women's Pureboost X ATR Running Shoe Textile and Synthetic Imported Rubber sole Shaft measures approximately low-top from arch Weight: 8 ounces (size 7); runner type: natural; midsole drop: 9 mm (heel: 25.5 mm / forefoot: 16.5 mm) Techfit upper is engineered for natural, flexible support and a seamless, sock-like fit; reflective aquatech print Boost is our most responsive cushioning ever: the more energy you give, the more you get Stretch web rubber outsole flexes underfoot for an energized ride Removable molded sock liner for an anatomical fit; free-floating arch under the midfoot for a sock-like feel; atr outsole works like winter tires for your feet; soft lining for maximum comfort