I did a lot of research on this and found some of the best info on Doo talk. I bought a CKX titan and a set of their heated goggles. I ordered a set of the pro-vue goggles along with a set of cheaper clip in inserts from Goggles n more. Right away I didn't like the clip in inserts as the frames are small and at the distance they are at in the goggles I noticed the frames too much. The pro-vues are flat out awesome. After deciding I liked the pro-vues I ordered a second set as he offers a discount on the second set. I removed the inserts from them and carefully drilled holes in my heated CKX lenses and wear those on cold days with no fogging at all even when stopped for long periods of time. I wear the 100% goggles that Pro-Vue uses on warm days. The trick I found to making it work is keeping my head cool which means no chin curtain and the thinnest balaclava I can wear for the temp. the helmet is very warm with no wind leaks If I hear or feel wind I know something is out of place and stop and just remove the goggles and adjust the skirt around the goggle port of the helmet.