Why so much polyester?

[I'll be brief]

Why are so many swim briefs made from polyester and/or lined with it? There are so many great looking suits made with polyester. I can not wear polyester, I break out in a rash if I do. Of all the places to break out in a rash the bathing suit region has to be one of the worst. I am receiving an unexpected monetary windfall and would like to splurge on new suits and a pass to the local pool. Does anyone have any ideas on were to find polyester free suits?
Thank you,
I'll be brief

[sebbie]

On the outlets such as swimoutlet.com you can sort the men's briefs by fabric type. Many nylon not polyester are listed but most are a nylon Lycra blend.

Sebbie

[6feet5]

I think it's because it's cheap

[Torchwatch]

What exactly are you allergic to ?
Does you allergy include nylon and Lycra fabrics?
Virtually all the thread used to sew swimwear with is polyester, does that effect you?
Are you ok with elastic and elastane (the stretch factor in Lycra)?

I have some bamboo silk, it's organic and really nice stuff, I even have organic cotton thread to sew it with. I had intended to make Japanese style fundoshi loincloths, that stay up without elastic.

[tightjeans]

Polyester is more durable from a wear standpoint and more chlorine resistant. and probably cheaper as well.

[I'll be brief]

Torchwatch,
Polyester is the only fabric that I have any problems with. If nylon or spandex ever becomes a problem I will be doomed.
Thank you,
I'll be brief

[SDSpeedoLuvr25]

Polyester is more resistant to chlorine than spandex or lycra, making the suit last longer. I don't mind the polyester blends, but they don't feel as smooth as a spandex, lycra, or nylon.

[sharky]

Aussiebum, Caussie and Eyeline -all from Australia manufacture suits from 100% nylon. Go for it!