Alpinestars® DRYSTAR® waterproof membrane Short calf boot Wide entry for convenience Accordion flex bellows for increased flexibility and comfort Double self-aligning, quick-release/locking polymer buckle system for secure fit PU coated leather upper Microfibre flex bellow at calf Internal toe and heel protection TPU ankle protection Newly developed TPU shinplate and calfplate for improved support and impact protection Bio-mechanical lateral “flexi-blade” system to support and protect ankle Integrated steel shank insole for rigidity and superior safety TPU shiftpad with technical texture and internal reinforcement and padding Alpinestars® exclusive vulcanised rubber sole for optimal comfort and grip Unique dual branding