These are fantastically comfortable and feel almost like wearing nothing. They are very airy and great for lounging around on hot summer days.

I wear these at work in an unairconditioned warehouse doing physical labor (walking and squating in 90+ temps with high humidity).  However, the material is very slippery which makes my pants continually slide down as I move about, regardless of how painfully tight my belt is.  The 3" inseam is also just too short and tends to roll up with a lot of movement.

Unfortunately, these are just not as good as Underarmor's "O" series which I now prefer.  To be fair, I actually bought the give'n'go first because nylon doesn't block body heat like polyester...however I had to look elsewhere when the give'n'go just weren't cutting it.  The "O" series is slightly less comfortable, but far more functional.

To save money, I only have a few pairs of either that I wash in the sink after work and wear again the next day (I do the same when I travel and go camping.)  I haven't noticed any difference between the drying time, durability, or packing size between the two.