The typical ski mask sits on your head and doubles as a knit hat. What hasn't been realized yet is that if you poked three holes in your turtleneck, you could pull it over your face and get the same result. The only benefit the hat version uses gravity to its advantage. The balaclava turtleneck could easily slide off your face without the proper elasticity. The only people who could reliably use it with would be astronauts. It IS cold in space.