Joma Top Flex 2121 Turf - Black-White 12 Durability A technology providing the sole with greater durability thanks to high resistance rubber slowing down the wear caused by abrasion, thus extending the life of the shoe. Flexo A grooved flex system placed ergonomically on the sole to offer the best transition from heel to toe at every step.At the heel it only allows for the bending of the sole, providing better grip and more natural and flexible movement. Protection A material used in different areas of the shoe to reinforce its strength and durability.