Alpinestars SP-X BOA Boot vs FXR Men's X-Cross Pro BOA Boot

These are different tools. The Alpinestars SP-X is a CE-certified sport and sport touring boot with a TPU toe slider, heel counter and TPF sole frame, built to protect a foot on asphalt and still let you walk. The FXR X-Cross Pro is a winter snowmobile boot with a HydrX membrane, 600g insulation, a -40°C cold rating and a fur-lined fixed liner, built for cold and wet. Buy the Alpinestars for street and sport riding; buy the FXR for sleds and deep winter. Owners rate the Alpinestars well overall, though some note the BOA dial and the non-waterproof upper as limits in rain.

• Choose the Alpinestars SP-X BOA if you ride a sport or sport touring bike on pavement and want a CE-approved boot with a toe slider, ankle protection and a sole you can walk in.
• Choose the FXR X-Cross Pro BOA if you ride a snowmobile or spend long days in freezing, wet conditions and need insulation, a waterproof membrane and a fur liner.