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Alpinestars Official Store, ALPS-222306 S-MX 4 Boot, alpinestars.com

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S-MX 4 Boot
The creative new S-MX4 is a hybrid of high-performance racing technology coupled with every-day street riding functionality and practicality.


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price: $199.95  

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  • The creative new S-MX 4 is a hybrid of high-performance racing technology coupled with every-day street riding functionality and practicality. Highly durable with a natural range of motion, the S-MX 4 also features a wide fitting foot shape for maximum comfort.

  • Durable microfiber construction and injected PU shields the shin, ankle, calf, toe and heel from impact while minimizing abrasion.

  • Innovative air vents at the shin, calf, heel and forefoot are covered with a specially designed mesh (with a waterproof membrane) to provide unmatched levels of rider comfort.

  • Large instep and Achilles flex zones for superior comfort.

  • Quick drying polyamide lining is laminated with open cell foam and high density contoured padding to absorb shocks to the foot area.
  • An extra wide Velcroz® flap, in unison with an innovative offset rear opening/closure system that features an elastic mounted zipper, adds up to a precise, comfortable fit.

  • Anatomical and removable PU foam footbed is vented to keep the rider's foot cool and comfortable.

  • Interchangeable bi-injected PU toe slider with snap-in assembly.

  • 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 to the arch area.
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