The Amphipod armpod for the 6th generation ipod nano is the best armband I came across. It stretches when you lift weights and it doesn''t pinch you like others I had. I highly recommend this. Nothing else compares!

I needed something to keep my Nano relatively dry and conveniently located while exercising.  I found this model and it was one of the few that was small enough to fit my Nano like a glove and still be comfortable, easy to use, and protective of the device.  I've lost two previous Nanos to moisture damage from sweat but this armband does a good job of keeping it safe.  I did notice some condensation on the inside after a second intense workout on the same day, but I attribute that to the fact that the armband didn't have time to dry out thoroughly before the second workout.  Also, this is not a waterproof armband, just more water resistant.  If you are running or exercising and get caught in a rain storm or splashed by a car, you might have problems.  But for sweat protection and convenience, this armband is really good.  Having the option to wear the band around my wrist or bicep is a nice feature..