Polypropylene is also color-fast, so it will resist fading and continue to
look good even in chlorinated climates.
In other words, this fabric keeps you warmer
than any other currently produced apparel fabric.
If you work or play
outdoors in cold weather, then polypropylene thermals are definitely for
you.
They are available in black or brown and in sizes ranging from adult XSmall through adult 3XLarge.