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Out of town?
Call Toll Free
(800)705-2918 
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- The S-MX 4 boot provides a combination of high-performance racing technology, combined with everyday street riding functionality and practicality
- Newly developed, high-technology micro-fiber gives the boot an exceptionally low weight, while retaining a highly durable and abrasion-resistant outer skin
- More streamlined profile and compact shape has improved the riding performance and styling as well improving overall fit and riding comfort
- Lasting profile gives an accurate foot fit and greater comfort for all foot shapes
- Injected TPU protectors shield the shin, calf, heel and toe from impact and abrasion
- Subtle air vents in the shin, calf, heel and forefoot are covered with a specifically designed mesh to provide a high level of breathability and comfort
- Flex bellow areas improve forward and rear movement for the Achilles and In-step
- Upper panel shapes improve shape retention and natural flex
- Quick-drying polyester lining is laminated with open cell foam and high-density contoured padding for shock absorption in the foot area
- An extra-wide hook-and-loop flap, in unison with an innovative offset rear opening/closure system works with an elastic mounted zipper to give a precise, comfortable fit
- Anatomical and removable footbed is vented to keep the rider’s foot cool and comfortable
- Interchangeable, bi-injected TPU toe slider with snap-in assembly
- Alpinestars exclusive rubber compound race sole provides a precise feel and improved grip both on and off the bike
- Exclusive sole features a structured shank reinforcement for added support and protection of the foot arch
- The S-MX 4 Waterproof boot features Alpinestars exclusive waterproof and breathable membrane to ensure 100% wet-weather performance and comfort (available in black)
- The S-MX4 boot is CE certified
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