Incorporated stretch inserts for fit and ventilation ports for airflow and breathability

The sole construction is based on the latest Alpinestars advanced urban shoe development to provide a perfect casual comfort with the guarantee of a high level of protection thanks to the Alpinestars Transversal Protection Frame (TPF)

And for comfort

and stretch softshell inserts

The Nucleon Flex Pro Ci features an easy-to-use

supertech r boots 2020 black Footwear Size:43 Incorporated stretch inserts for fitEngineered for road riders, the Supertech R Boots deliver racebred performance in Alpinestars motorcycle footwear refined by pro racing feedback. CE EN13634: 2017 certified, they use a synthetic microfiber chassis with accordion flex zones, a breathable 3Dmesh inner bootie, injectionmolded shin plate, TPU shifter panel, and replaceable TPU aluminum toe and heel sliders, while a side zip, hookandloop lock, microratchet, and grippy rubber sole optimize