SP-X BOA Drystar® BootsErgonomically optimized touring design, the mid-length SP-X Boa Drystar® Boot® is engineered to deliver the highest levels of comfort when covering big miles in the saddleWaterproof and breathable Drystar® membrane guarantees exceptional wet weather performanceWith its grippy, rugged sole, this boot is built to excel in all conditions and terrains, on and off the bikeLateral side entry system incorporates BOA Speed Lace System technology for a quick, precise, and secure closureMain upper is constructed with a combination of advanced microfiber, knitted mesh and co-injected Thermoplastic Polyurethane (TPU) with Lycra for the optimum blend of comfort, breathability and performanceEquipped with a Drystar® liner for proven all-weather performance, remaining waterproof while still being highly breathableRubber sole utilizes a special compound that provides textured grip and excellent absorption, and features an integrated support shank for an enhanced sole rigiditySports sole design incorporates a high flex inner structure (lasting insole) for superior walking comfortDesign of shift pad features TPU technologies for superior upper foot protectionTPU sliders are strategically positioned on lateral toe-box and on lateral calf for optimum flexion and protectionTPU heel counter design ensures impact protection in a critical area while also offering additional support and securityDual density ankle protectors are strategically positioned between the upper and padded lining to provide strategic protection in key areasInternal shin reinforcement is layered under the upper for impact protection in a critical area