Hello, I have had several questions regarding Polypropylene clothing. I wanted to take this opportunitity to answer a few questions. Polypropylene clothing is great for extreme weather conditions. Polypropylene has the lowest thermal conductivity of any traditional apparel fiber. Dry polypropylene does not absorb moisture: its unique vapor transfer ability moves moisture away from your skin and keeps you dry no matter what you are doing. Whether you are out skiing the slopes, trial riding, hunting, fishing, or just working out in the yard, polypropylene apparel will keep you warm and dry in cold weather conditions. I like to think of it as " The science of staying warm".