Alpinestars Tech 10 Boots-White/Red/Yellow-9 The one-piece co-injected foot chassis incorporates five different advanced polymer compounds in a single streamlined and lightweight piece to offer strength and flexibility throughout the structure, while maintaining its robust structural integrity with no joints or weak points. Innovative, lightweight upper combines full-grain leather with advanced lightweight microfiber and an impact and abrasion resistant TPU shell. New buckle closure system includes high-impact aluminium bridge closures, with memory and a quick release/locking system with self-aligning design for easy, precise closure and improved riding performance and security. All buckles are easily replaceable. Exclusive dual compound sole is seamlessly integrated to the multi-density foot base structure with built-in support. The sole offers superior durability, grip and feel while riding. Multi-density foot shell incorporating heel and toe protection is highly resistant to abrasion and impact, and adds to the boots overall durability.