NIKE Lady Lunarglide+ 4 Running Shoes Synthetic *Evolved Full Length Flywire Technology* - ultra lightweight and very strong this new fabric gives great support without weighing the shoe down or compromising on comfort *Enhanced Lunarlon Cushioning* - Designed for miles and miles of soft, springy and more comfy experience when you run. Dynamic Support Platform - combines soft and firm foam for adaptive support and cushioning when running and hitting the ground. Inner sleeve - made with sandwich mesh for a dynamic, sock-like fit that hugs the foot and allows for easy on and off NIKE+ - This shoe accepts the revolutionary new Nike+ sensor. As seen on TV - this shoe is Nike + enabled. Buy the Nike + sports kit (see recommended products below). Place the sensor into your Nike+ ready running shoe then get workout feedback and energy boosting power tunes through your iPod nano during your workout.