The Navigator Spider is actually a copy of a UVEX Cycling Glasses. This is, however, no longer offered since 2006, which the spare parts issue, in particular the re-ordering of opti Schenn correction Clips extremely difficult. The Navigator on the other hand offers exzelenntes value for money (the UVEX got not less than 100), super fit and especially the very comfortable optical clip. Even stronger glasses (with me -7 diopters) can be grind in there easily. It takes anywhere an air, fogging is really not an issue. Only the supplied glasses leave something to be desired; both pairs glasses are kept in "dark gray" as an orange / yellow / clear option would be much more appropriate. When changing lenses is some force application needed; the profile of the retaining lugs in the glasses is probably something to fall sharply, which is a strong pull and bend the frame requires ... The glasses can however without problems from :)
