I wear athleisure (Lulu spandex shorts/leggings) 24/7 as a WFH person that also works out 3-5 a week. I'm also...a sweaty lady. "Performance" fabrics like nylon/polyester/cotton blends stayed dry throughout the day, but held so much stink! Cotton was better on the smell front, but once wet, wouldn't dry and was just heavy and even chafed my bikini line a couple of times. Enter, wool! Specifically, 95% wool with a touch of elastane for stretch, and very thin so it can't absorb too much moisture. $50 for a 3 pack seemed STEEP, but a single day in the new undies had me running back to the website to buy more. Feather light (I forget they're on), very resistant to smells, soft, and so comfortable= I'm a convert. Yes, air drying is a little finicky, but if you have leggings or workout clothes, you're likely already air drying stuff anyways. I recommend a garment bag to hold the undies- keeps them from getting roughed up too much by the washing machine, and makes sure no pairs sneak into the dryer. If I could give 6 stars, I would. P.S.- definitely size down! 5' 3", 175 lbs, size 12 in pants but SOLIDLY medium in the undies. Large would be way too big on me.