Proprietary mirror-lens technology (putting the mirror on the inside of the goggle) works like a dream on sunny days
Lens-interchange system has too many snap-in points for efficient, on-the-go use
Frame feels a bit flimsy for chargers
Not enough integration between the lens and the frame; I never felt like I was guaranteed to have a flush seal
The Boreas has a ways to go before it can contend in the interchangeable-lens category with heavyweights like Oakley, Scott and Smith. It could use a burlier frame and more technologically advanced lens-interchange system.
The Boreas is the least expensive goggle in its category, but that didn’t mean as much due to a few performance shortcomings.
Venting/Fogging No fogging issues. I felt a little breeze inside the goggle at one point but adjusted the frame and it went away.
Field of Vision This is one area where the goggle shines. It’s easy to pick up obstacles on your periphery.
Frame construction One of the goggle’s shortcomings is an inadequate seal from the lens to the frame above the nose. When that gets compromised in a crash (i.e. the lens bows out for even a moment), snow infiltrates the seal and floods the goggle’s interior.
Fit Because of the flimsier frame, the goggle tends to adjust more than its competitors to faces of varying shapes and sizes.
Look and feel A little too much lens, not enough frame. Still a sharp looking goggle overall, but this can be improved with more lens-frame integration.