how do these do with odor? I am planning on going on a week long hiking trip and do not want to take many clothes.

They do great. I wouldn't expect them to smell washer-fresh after seven days, but they shouldn't reek to bad after a week. They are synthetic so they will start to gain critical bacterial mass after a while, but they are also anti-microbially treated to help out with that. They are super light and super-packable, so you could stash a spare pair to switch out to, or, since they dry incredibly fast, you could wash them out one night, hang them up under your shelter and be good to go by morning (which is what I do.) For synthetic underwear, these are still my favorite hiking and travel undershorts, bar-none.

well, my friend, I can say that these will smell. I used them on my Appalachian Trail thru-hike where I would go a week or two without washing my clothes. These were my camp boxers, so I didn't wear them while hiking, but after a while they start to smell. The great thing about them is they are incredibly easy to rinse out in a river -- and then you're golden!

I have not worn these in particular, but the 'new' Capiline (Cap 1, 2, 3) resists odor much better than the older stuff (silkweight, lightweight, midweight). (sorry it's not a great answer, but i figured some info was better than none)