Alpinestars Sp-X Boa Boots Meet the Sp-X BOA Bootsa blend of style and performance designed for sport riders seeking coverage and protection with an over-the-pant look. These boots feature advanced microfiber, ultra-soft Rideknit material, and knitted mesh in their upper, ensuring freedom of movement. With integrated shin protection, dual-density ankle discs, TPU shift pad, and toe slider reinforcement, they prioritize safety. Plus, the BOA speed lace system and medial zip make them easy to put on and take off, offering precise closure and comfort. Construction: Advanced microfiber and ultra-soft Rideknit calf Front bellow made in Lycra co-injected with soft TPU for enhanced comfort and durability Integrated PU heel midsole Protection & Safety: TPU heel counter, shift pad, toe slider, and Rotor protection TPU protective parts Internal dual density malleolus impact protection Integrated shin guard Meets CE CE En13634:2017 standards Comfort: Dedicated side BOA speed closure system engineered for optimal closure and personalized fit Dual heel cushion pads Removable anatomic EVA footbed with Lycra lining Engineered profile for comfort Walking roll and asymmetric heel shape for walking stability