For me, a transparent latex encasement is like my real skin. As my transparent mask represents my real skin, I of course place another mask over this skin. What could be better than a rebreather hood? Now I am only connected to the outside world through 2 mini holes. Every time I breathe, the rubber layers suck on each other. It is difficult to breathe, but the awareness of the multi-layer rubberisation helps me to cope with my shortness of air.