Love!! These are the best underwear you could ever ask for when traveling, and for everyday wear. Anywhere I go I always take a couple of pairs. If you wash them at night, they're dry by morning. If you put them in the washing machine, I would recommend NOT putting them in the dryer (they will slowly but surely shrink).
They also stay in place pretty well, I haven't had a problem with them riding up. I wear a size 4 - 6 in pants, so I ordered a medium. Very comfortable waist band also.
They're very comfortable and cool in the hot weather.
Definitely a must have for camping, road trips, backpacking, etc.

On a side note, if you're looking at the bras, there's not a whole lot of support. Pretty much just a little fabric between you and your shirt/dress.