Belly Band Breakout?

aspensonj

So, I busted out my belly band last week (how amazing is that thing?!) but now I have a bumpy rash across my back and a little on my stomach.  I'm assuming it must be in response to the band, but I'm not exactly sure why.  Am I allergic to the actual band itself?  Should I have washed it before wearing?  (I'm sure the answer to that question is YES, but I needed to wear it ASAP and was too lazy to wash it first).  Any ideas?