dye i4 pro shadow sort graDye I4 Pro is the latest addition to the DYE family. You get all the great things you know about the I4 masks. Namely the slim and lightweight profile and the great fit. The Pro model has just been further developed with the smart strap system that can be turned and This tightens the mask it's really nice to use. You get a thermal lens and good ventilation by using the I4. The model here is Meltdown, which is Black and Red