I'm a big guy, too (6'3" 235 lbs) and if my pores were any smaller, I'd squirt sweat. But I also REALLY don't like feeling dirty and grimy. Some of the advantages of lightweight nylon clothing over cotton or poly blends is that they are very cool and breathable, dry in a flash, and are very compact. One underappreciated piece of outdoor gear I ALWAYS carry is a lightweight collapsable bucket.

It has many uses: bathing, hauling water or foraged items, and clothes washing. The trick to washing oneself or one's clothing in the field is to use an easy-rinsing soap like Dr. Bronner's or Campsuds, and in a far smaller quantity than you're used to at home, because rinsing is the most water-consuming part of the process.

I am used to washing and changing my shirt, socks and underwear, and bathing every evening. All my stuff will be wearable immediately after washing, or completely dry in a short time, because none of it absorbs much water.

Jeff