First you can swap a lenses in 30 seconds. Second the lenses is ultra scratch proof. I got pelted by rocks at Hangtown and no scratches.
3rd- huge field of view.
I had the F2 series before and these signature series are even better. Huge field of view. Sure scratch resistant. Changing out the lease is super easy. Took me about 30 seconds to change out the lense.
My only beef is that the clear lenses don’t seem to ever be in stock.
I have been more than impressed
With the design and the engineering
Of these goggles. Fit and Finnish is
Excellent. The lens are very
Clear with no distortions
The best goggle I have ever used
SIGNATURE/ALPHA SERIES TEAR-OFFS are easy to install and resist scratches more than most. I hate laminated tear off and these standard ones offer low to no distortion no matter how many you stack. The only drawback is that they are not anti-static and seem to attract certain types of fuzz and dust. A quick brush off with a microfiber towel before hitting the track takes care of that issue.