adidas Women's Adizero Ubersonic 2 w Think Pi Tennis Shoe 100% Synthetic Imported Rubber sole Boost's energy-returning properties keep every step charged with an endless supply of light, fast energy Seamless knit upper for ultimate fit and comfort Lightweight tpu foil welded to upper for enhanced durability in key abrasion areas Ergonomic tpu heel counter for stability and comfort during cutting movements; soft eva midsole provides lightweight cushioning Adiwear 6 outsole offers the ultimate in high-wear durability