Dedicated female fit for optimal riding comfort, Packed with a host of innovative safety and protective features, the Stella SMX-6 v3 Vented Boots are the ultimate track and street performance riding boots packed with race-derived technology and protective materials designed to give riders a crucial performance edge on the track or street, Upper been precision-engineered to closely conform to the anatomical contours of the foot, offering optimal flexibility, improved walking comfort, and breathability, Every component has been carefully designed with rider performance in mind, including the protection innovations, improved ergonomics, and comfort features, Upper constructed from an advanced microfiber with a dedicated laser perforated area for breathability, engineered to offer light weight, high-performance protection against abrasion and designed to provide superb levels of flexibility, Front flex and back flexion zones are constructed with textile over-injected on 3D mesh, with soft Thermoplastic Polyurethane (TPU) for enhanced impact abrasion while also promoting a natural forwards and backwards movement, An evolution of Alpinestars unique ankle brace protection system provides a biomechanical support and protection between the lateral top calf, the shin and ankle, for superior ankle articulation, as well as providing Achilles and ankle impact protection, Alpinestars Lace-Lock System is constructed from an advanced polymer resin for a guaranteed quick, precise, and secure closure, Main upper material is constructed from microfiber with an area that has laser perforations to provide durability, high levels of abrasion resistance, and flexibility, as well as breathability, Air vents on heel counter and shin plate plus breathable mesh inserts on the back improve comfort and reduce fatigue on short and long rides, Perforation padding on entire boot, including front and rear bellow, collar, and ankle for added ventilation and breathability, as well as premium rider comfort, Ergonomic last for forefoot streamlining to enable greater control and improved precision on the bike*s controls, Ergonomic elastic gaiter in front provides a precise fit in any condition, front flex and back flex design combines textile and over-injected, soft TPU areas, offering improved impact abrasion and optimal, natural front and back movement of the foot, Medial side entry opening/closure system features elastic-mounted zipper with wide hook and loop closure, Streamlined contact surface with the bike for greater control and rider comfort, Pull flap with dedicated design for increasing pensility and facilitating the hook and loop closure, Dual compound removable anatomic footbed made in EVA with Lycra on top, Internal insole with integrated shank reinforcement for support to the arch area and foot protection, Internal toe box protection is layered under the upper for durability, improved feel, and overall performance, Sole is constructed from a lightweight rubber compound offering excellent grip on the pedal box, TPU lateral ankle brace protection provides a biomechanical support and protection between lateral top calf/shin and ankle, Equipped with TPU shifter zone for superior protection on the lower medial side, Strategically positioned, race-derived TPU shin plate protector delivers superior impact and abrasion resistance while offering a more compact design, so the boot fits easily under the pants