Take one of the cheapy Mylar blankie,Unfold it,Then fold it Diagonally,Like a Diaper.Then fold like you would a Bandana,Making it aprox.A 1ft.width,After it's folded,Wrap it around your torso,just above your hips,& tuck in the last tailend,into the wrap,on the upperside,You will start to heat up,Very quickly,When you are warmed up,Unwrap it,Do the samething with your upper torso,until warmed up,When it is folded diagonally,It is quite a bit longer,but you only have 1/2 of the surface area for coverage,Next wear it like a Shawl,& Hunch down,&It will Somewhat Effectively, keep the heat in,rather than lose it out the top.The movement from doing this,Also generates heat,Hunched down you have much less,surface area for the wind to penetrate.You have just found out.how to make these Cheapies work for you!