TPU heel and mid-foot pieces are attached with a strap to support the foot. IGNITE 3 tooling offers enhanced energy return, and a faster chevron design delivering a premium look. Bonded overlays increase comfort and fit. PU Foam midsole offers superior energy return and full length comfort. EVA sockliner offers molded comfort under the foot. EverTrack+ outsole rubber provides durability and traction in the heel and forefoot. Flex grooves offer plenty of flexibility. Redesigned transition line runs from heel to toe, mimicking the natural gait pattern and offering a smooth ride.