SMX-6 V3 BootsPacked with a host of innovative safety and protective features, SMX-6 V3 is the ultimate track and performance riding all-rounder, and incorporates race-derived technology and materials to give riders a crucial performance edge on the track, and the streetAdvanced microfiber upper construction for lightweight high performance protection against abrasion and superb levels of flexibilityFront flex and back flexion zones are constructed with textile over-injected with a soft Thermoplastic Polyurethane (TPU) for enhanced impact abrasion while also promoting a natural forwards and backwards movementAlpinestars unique ankle brace protection system provides a bio-mechanical support and protection between the lateral top calf, the shin and ankle, for superior ankle articulation, while also limiting hyper-torsion, hyper-extension and hyper-flexion, as well as providing Achilles and ankle impact protectionAlpinestars Lace-Lock System is constructed from an advanced polymer resin for a guaranteed quick, precise and secure closureEquipped with a TPU shifter zone for superior protection on the lower medial sideStrategically positioned, race-derived TPU shin plate protector delivers superior impact and abrasion resistanceDual density TPU ankle protectors are strategically positioned between the upper and padded lining to provide the strategic protection in key areasReplaceable, dual density TPU toe slider with screw-in assembly provides comprehensive protective coverage around the outer toe area while still being supremely flexible for walking comfortReplaceable heel slider and external side heel slider are strategically positioned for optimum shock dissipation and absorption, while promoting sliding in the event of an accident