I mistakenly thought the material of this suit was nylon/lycra. It turned out to be polyester. I tried the suit and found I do not like the feel nor the fit of the polyester material.

I have other Tyr durafast suits and just ordered/received this one.  I have had good experience in the past with the suits, and this one is good looking.  The one nit I have is that the seat seems looser than other Tyr briefs in the same size (it feels like it billows when I swim, and there seems to be more overall looseness/movement than with other Tyr suits), and the material may be a bit thinner.  This may be the result of a change in suit or fabric supplier or the cut (the seat is longer than other size 36 durafast suits).   I might try a 34 rather than 36 (though my pants/shorts typically are 34, but have found a 36 Tyr usually is better fit in poly material but am now reconsidering that conclusion).