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As polypropalene(olefin) is lighter than polyester, why are no fleeces made from it: if your cold and not sweating much smellyness shouldnt occur much?
Or what about the acrylic fur in fabric shops: this seems much lighter than fleece/fibre pile of same thickness?
Polypropylene fleece is widely available as military surplus base layer garments. It's not very comfortable, and often has odor retention issues. It also melts instantly when exposed to high heat.
I don't think acrylic is as breathable as polyester.
Alan,
Depending upon its chemical structure, olefin may be called polypropylene. The plus is that polypropylene has 0% moisture regain but the minuses are that it easily damaged by dryer heat and it retains body odors. It is a common base layer fabric.
Acrylic's major minuses are that it has a moisture regain that is approximately 4x the polyester used in in Polartec fleece, it pills easier than polyester, and that it is less resilient. The plus is that it is less expensive than polyester. It is a common fleece insulation layer fabric.
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