Hi Aimee,
A percentage of people here, including myself, have noticed that there is a significant difference between nylon and polyester as regards stink (nylon being less so), and ease and efficiency of getting out what stink does accrue (nylon wins again).
It seems to be somehow related to the property of moisture regain (how much moisture a material absorbs into it’s material by weight percentage), because the synthetics with lowest moisture regain–polyester and especially polypropylene–stink the most. If you think polyester is bad, polypropylene is on a whole other level. Polypropylene absorbs practically no moisture into it’s actual material, and stinks to high heaven and quickly for many. Polyester absorbs just a little bit, and is a little better than polypropylene in the stink area.
Nylon on the other hand, has about half the moisture regain of cotton (fairly absorbent), so it’s high for a synthetic, but still dries noticeably faster than natural or semi-natural/semi synthetic fabrics (tencel, rayon, modal, etc) that are absorbent. Correspondingly, it has significantly less odor build up and retention than polyester and especially polypropylene.
But i’ve found that a majority of nylon with some absorbent material (like tencel), works really well in that department, and if thin enough, still dries pretty fast.