The Nav IIs are very comfortable even for those of us with large heads. They feel suitably robust and the lens change is quite easy, although the instructions supplied with mine were the wrong ones and I had to figure it out for myself. The lenses seem flawless and wrap comfortably round the face, and the vent at the top is very effective at preventing misting.
Better quality than many similarly priced shades from Boots or Next, and the only negative is a couple of tiny flaws in the plastic mouldings on the arms.
I have found these glasses excellent. Lightweight and comfortable, they seem to sit very nicely on my face. No problems with fogging going up the big hills because the only contact point with my face is on the nose pads and the air seems to circulate well behind the lens. Quick to change lenses and the supplied cloth/bag cleans the grime and fingerprints off quite well. I did however get the wrong instructions supplied, almost broke them trying to get the lens out the incorrect way.
Fine pair of shades, very comfortable and i luv the lens changeability. Ride with them commuting in all weather everyday so need the flexibility. Just wish they didn't scratch so easily!! The supplied storage bag is OK but useless at protecting the spare lenses from the other junk in my bag, so all are looking well-used after 6 months. Where are spare lenses sold, without the frame?
