Dye i4's. Just like most dye products, they are expensive, but like the rotor, it is worth every penny, it is so light weight, compact, I have nothing bad to say about them, it changed my game massively, from using rental masks, to dye i4s, was like playing blind folded, to playing normally, its amazing. One of my first times ever paintballing i was using a rental mask, fogged up instantly, as we was in a boggy environment, we was in a field called trenches, and it was full of them, it had been heavy rain for the past few days, and one of the trenches had about a foot of water, and while running blinded, i fell straight into it.