The Alpinestars SP Shoes main upper is constructed from premium suede for optimum levels of durability, comfort and fit. It was developed with asymmetric lacing system for supportive closure and customized fit plus laser perforations for breathability which are incorporated into an anatomically profiled shoe that also features Alpinestars exclusive ultra-thin Formula 1 specification sole with special line textured grip and improved pedal feel. FIA 8856-2000 and SFI 3.3 homologated.
TO ENSURE AN ACCURATE FIT, use this chart to order your correct helmet size. Carefully measure around your head, above the ears. Take the measurement, in inches or centimeters, referring to the sizing chart below for your correct hat/helmet size. Helmet must fit properly for optimum performance. Don't guess your size. Helmet must be securely and snugly fastened before engaging in any activity.