• Lens shape: Large Cylindrical Lens Design
• Lens: Upgrade Lens Leval 2 Extreme Cold ResistanceStable operation below -40°C
• Lens Function: Electric heated/support mask wearing / magnetic lens/high impact resistance/UV400 protection/anti scratch/Anti fog
• Frame material: environment - friendly material is available, bio-based and TPU materials
• Foam: single / double / triple layer high density foam
• Feature: The upper and lower magnetic conductive contacts in the middle ensure smooth circuit
• Strap: elastic, anti slip
• Nose Pad: Easy Exchangable