The lightweight, speedy design of the Nike Lunar Speed 3 will put you ahead of the curve. This tour-tested shoe incorporates Flywire technology for ultimate, lightweight support. Upper: Nike Flywire technology provides support in an extremely minimal and lightweight package. A reinforced toe cap provides increased durability in this high wear area. Air mesh padded tongue maximizes ventilation and comfort. Padded heel collar with internal heel counter. Perforations in the toe box and a medial side mesh panel provide ventilation.