Your wearing 4,5,6 layers of clothing and exercising,seems about right to me.

As far as I know,there are no one-way fabrics.If it can keep water and wind out,it can keep it in also.

Companies keep claiming this,it may work in the lab on lab rats or with fans or test beds,but in the real world it doesn't work that well.

Best I can tell you is to wear wool.It may get wet but it will keep you warm.I wear a $40 rainjacket from Campmor,rain or no rain,layer up with wool underneath,no complaints.