The most energetic spike on the track. When it comes to cushioning, we prescribe to a very strict, "more is more" policy. The new Cielo FLYX breaks the mold with 25mm of bouncy, high resiliency PEBA foam. We've employed a composite plate that doubles as both a midsole propulsion plate and outsole spike plate, along with an ultra-breathable, engineered mesh upper, to deliver an elite race spike that will tackle anything from 1500 meters to 10K and every distance in between. Deconstructed collar with microfiber edge. Single layer engineered mesh upper. Full stack, high-resiliency PEBA midsole. Composite plate. Aggressive rocker profile. Thin, breathable performance tongue.