Any of a class of organic substances composed of large linear (chain-like) or cross-linked (network) molecules, or polymers, formed from a large number of smaller molecules, or monomers, by establishment of ester linkages between them.
Polyesters most commonly are prepared from equivalent amounts of glycols (organic compounds containing two hydroxyl groups) and dibasic acids (containing two carboxyl groups).
Or if you prefer, a rather shiny version of cotton that doesn't let the sweat out.
This entry has been classified as 'Mostly Harmless' while it awaits additional research.
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