The great Alpinestars S-MX Plus racing boot which raises performance and safety to new and unmatched levels with its innovative design, structural protection and comfort.  New  Design For 2011 Smx-Plus Boots  High Tech Microfiber Upper Construction  Lightweight And Extremely Durable  Shock Absorbing Open Cell Foam In The Forefoot  Highly Breathable Lining For Improved Comfort  Large Accordion Zones For Maximum Flexibility  Durable Sole Designed For Improved Feel And Grip  Unique Multi-Link Control System - Advanced Support/Protection For Ankles And Achilles  Contoured Shin Plate  Wide, Ventilated Heel Counter Extends To The Ankle  Replaceable Heel Counter  New Design Toe Slider Covers More Of Toe Area (Replaceable)  Adjustable Ratchet Closure Lets You Fine Tune The Fit  Inner Kevlar Speed Lace System For A Precise Fit CE Certified