Built with innovative technology and designed without the constraints of world race regulations, the Prime X 2 Strung offers more performance-driven features in a single race shoe. It's constructed with a STRUNG upper, a textile innovation that transforms athlete data into a dynamic material tuned to the athlete's needs. Prime X 2 Strung also has 3 layers of LIGHTSTRIKE PRO, in a stack height of 50 mm. With an all-new energy core between two layers of foam, it helps to reduce weight and provide spring in the fore- and midfoot, so you can chase your fastest moment. An outsole featuring Continental compound delivers serious grip on a variety of surfaces.• Womens 8 1/2 / Mens 7 1/2• Lace closure• STRUNG upper• Textile lining• Lightstrike Pro cushioning• Weight: 10.8 ounces (size 9)• Midsole drop: 7 mm (heel: 50 mm / forefoot: 43 mm)• Continental™ Rubber outsole• Upper contains a minimum of 50% recycled content• Product color: Ivory / Core Black / Spark• Product code: ID0264New with tags, no box