If you buy some underwear, it inevitably contains some form of elastic to enable it to stretch to hold it in place. Lycra/Spandex are water-resistant forms of elastic. But they do not last forever. The material you've bought is either one of these types of product, so if permanently stretched it will have a reduced lifespan compared to when it's un-stretched. Certain colours are less resistant to u.v. than others in materials & elastics, so some colours will last less than others.
You can wind the stuff over wet(& thick grade) superglue, it will extend its life a bit but not much. Latex *dental dam) bodied flies look fantastic, especially when marked with Pantone's & the like but they very soon disintegrate into a sticky mass.
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