509 Sinister X5 Snowmobile Goggle Replacement/Extra MaxVent Lens

Perfect for riders that need increased airflow for improved anti-fog performance.

The X5 MaxVent Lens features:

• more than twice the lens vent surface area versus standard 509 X5 lenses
• 6 large top vents and two strategically placed lower lens vents
•  an all new Italian sourced Polycarbonate dual lens
• greatly improved anti-fog coating 
• significantly more durable anti-scratch coating. 
• Italian sourced optical lens