 The synthetic used for the synthetic version is a very thin padded synthetic that offers better touch on the ball allowing control in high speeds.The midsole has a perforated sockliner with synthetic top cloth which mirrors your natural foot shape enhancing comfort and flexibility.The outsole features a full length lightweight doubled layer fiberglass and TPU outsole ( leather finish has single layer fire glass for forefoot) which offers explosive acceleration and enhances multi-directional grip.