All CAIRNs lenses reach the ISO standard ISO1231-2:2013
Polycarbonate lenses that are highly resistant to impacts and scratches while being very light.
The SHELL PROTECTIVE system to a protection against the glare and the bad weather"
ULTIMATE, or maximum protection, CAIRNs glacier lenses let passed only 4% of light to protect you in all conditions
100% protection against the UVA and UVB