I bought a sly mask a while back because I loved the styling. Put it on, and it was incredibly comfy. The second I started running around, the thing fogged up. I played a couple rec games with it, it fogged every game, I took it off and sold it the next day. And yes, I had removed the "plug" from the vents ad it still fogged up.
Some people seem to have no problems with the profits, maybe it's all in how it fits to your face....a shame, because otherwise I really do like those masks, but if I can't keep it from fogging up every five minutes....
Dye DM12, CCM T2, Tippmann TPX. my feedback