Hank, I've noticed that most of the quick dry ones actually weigh more than cotton. If you go with one pair there is a trick. Look for really cheap boxers because the only difference from front to back is the tag. That way they double as four pairs. 1) Font, 2)Backward, 3) inside out front and 4) inside out backward. With two pair some shampoo and a sink you can travel indefinately. My favorite pair is has Scoob Doo on them, so they look like walking shorts too.
You can do the same with some shirts, and socks always double up that way but backward doesnt work unless you are a lizard or somehting.
Ohhh, I once stayed in this tiny little 8 room hotel inside the walls of Dubronik. "Do you have laundry service?" "Of course we do, they well be ready tomorrow morning." So I spent the day in the city and that evening when I walked up the narrow little street leading to the hotel, there was a clothes line stretched from one building to the one on the opposite side of the street and there waved Scooby Doo. And one time a LHR everyone in the security line got to see my Scooby Doos but thats a longer story.
if your hotel has a towel warming rack, this is perfect for drying
underwear, and especially socks!).
Clothes dryers are not common in many European homes, so those of us lucky to have a bathroom towell heater have this down pat.