If you could solve one clothing problem forever, would it be sweat stains, wrinkles, or odors?

Wrinkled clothes can be ironed and odors can usually be washed out, but sweat stains can be much harder to deal with, especially during work, travel, or social events. I'm curious which clothing issue bothers people the most and what solutions you've found helpful.
I've noticed more people exploring sweat-resistant clothing and checking out Neat Apparel Coupons when looking for ways to stay fresh and comfortable throughout the day.