Product Details About this Item Fabric Type Textile and Synthetic Origin Imported Sole Material Synthetic Closure Type Lace-Up About this Item Weight: 8.4 ounces (size 7); runner type: neutral; midsole drop: 10 mm (heel: 29 mm / forefoot: 19 mm) Boost is our most responsive cushioning ever: the more energy you give, the more you get Adidas primeknit upper wraps the foot in adaptive support and ultra-light comfort; free-floating arch under the midfoot for a sock-like feel Torsion system for midfoot integrity; dual-density 3d heel counter designed for women's feet helps increase stability around the heel Stretch web rubber outsole flexes underfoot for an energized ride; continental rubber outsole for extraordinary grip in wet and dry conditions Description These women's running shoes maximize the energy-returning benefits of boost with a stretch web outsole. An adidas primeknit upper adapts to the changing shape of your foot through the gait cycle, and the adaptive arch and heel counter are designed to give you the best running experience ever