Lightest swim trunks?

SPEEDOS… if ya got the body to go with them.

I have a pair of these that work great as both shorts and swim trunks.

http://shop.outlier.cc/shop/retail/summer-shorts.html

You could use running shorts as well.

Please no Speedos.

Yes agreed no speedo's. :)
Daniel, how much do those shorts weigh?

Speak for yourself. ;-)

Used as your hiking underwear to combat chaffing and as a swim suit as well. They just look like bike shorts so would be just fine.

I'm hoping for something somewhat modest. I don't want to scare other hikers with speedos or anything else form fitting.

In Mike Clellands video here: http://www.youtube.com/watch?v=_J4D3AHzlxQ
He seems to be wearing something a bit looser.

I've been looking at the mountain hardwear Refueler shorts: http://www.mountainhardwear.com/Men%27s-Refueler%E2%84%A2-Short/OM4623,default,pd.html

They are antimicrobial, 3.5oz and have a liner. They have a dwr finish on them, which is nice for drying quick, but I'm wondering if that will make me sweaty when worn under my pants?

It's very simple, actually. The higher you cut, the lighter they get. You're welcome!

Edit: [removed incredibly disturbing pic of hairy man in mid-cheek jean cut-offs. Now, only Roger's eyes will have that burned into the retinas! Hmmm. Maybe I'll repost in a thread about chafing]

Seriously, any running shorts (Saucony, Brooks, Pearl Izumi, etc) like the MH Refueler should be fine. Nice too that you can often find running shorts on sale at specialty running stores or places like REI or roadrunnnersports.com. Target has Champion brand ones. Just make sure the waistband and liner are comfortable for you.

I am really not sure that the photo should not be removed to protect minors …
Or to protect MY eyes.
Horrible!

Cheers