Alpinestars Supertech R10 LE Martinator R01 Helmet Size - Head Circumference (CM):M (57-58) RK 525XRE are designed with

RK 525XRE are designed with the concept of “From the Circuit to the Street”

which can save up to 1 kg and frees up a lot of under-seat storage

Slide-Seal top opens wide for easy filling and closes tight for a leakproof seal

Crown pad: elastic and breathable microfiber

Alpinestars Supertech R10 LE Martinator R01 Helmet Size - Head Circumference (CM):M (57-58) RK 525XRE are designed withAlpinestars Supertech R10 LE Martinator R01 Helmet The result of over 10 years of intensive study, development, and testing, the goal of the Supertech family of helmets is to create the most advanced, protective, and performance enhancing helmets possible for racers and riders worldwide. Following years of extensive research, development, and testing of the Supertech R10 road racing helmet by Alpinestars Helmet Product Development Department, together