A very hard to find item. Opitcal Planet seems to carry it all. The value for the replacement len is just about right, and they do perform alright. If you are running and performing training exercise, you may notice slight fog on your len, and that's very normal. The only downside is actually the goggle itself, not the lens; the goggle has problem retaining the len if you bend it too wide or narrow.
Pros: quick lens change
Cons: Goggle has problem retaining len if helmet is too wide.
This review was written in the old system and had content requirements that are different than reviews written today.