NIKE LunarGlide+ 3 Running Shoes leather-and-synthetic Rubber sole *NEW MIDFOOT STRAP* - This is the main difference between this shoe and the LunarGlide 2. This acts like a sling around your foot and as you run it tightens and cradles your feet, increasing the support and holding it in place in the shoe. New Flywire Technology - ultra lightweight and very strong this new fabric gives great support without weighing the shoe down or compromising on comfort LunarLite platform - at midsole for adaptive cushioning with gender-specific construction for superior fit. Meaning your feet are more secure and less likely to slip around so reducing the chance of blisters. Rubber outsole - with flex-grooves for increased flexibility and traction when running. 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.