These replace the original temples that came with the SG's in 2006. The fact that I'm only now needing new parts for these attests to the durability of the product. The old ones have literally been through fire and ice - US Desert SW and Arctic Canada for years. If you want glasses to protect your eyes in any environment these are the ones to get!
This review was written in the old system and had content requirements that are different than reviews written today.