Incredibly light and responsive, the Nike Women's Air Zoom Vomero+2 Running Shoe maximizes performance by positioning your foot closer to the ground through a thin profile Zoom Air shock absorbing system. This premium feel is complimented with a breathable mesh upper and supportive overlays, an external anatomically shaped heel counter, and a new foot shape design that provides optimum fit and comfort. A Nike+ pocket under the sockliner provides a secure place for an Apple iPod nano sensor that enables you to transform your iPod nano into a personal workout coach with the Nike+ iPod Sport Kit.hookup (not included). This wireless sensor and receiver combination works exclusively with your Nike- shoes and iPod nano to give you real-time feedback during workouts and let you track your performance on your Mac or PC. With supple cushioning and Nike+ technology you'll maintain the pace, no matter what your workout style.