The listing, Think Geek Big Bang Theory Caffeine Molecule Shirt has ended.
I bought this when I was taking organic chemistry and needed caffeine to survive. LOL. The tag says XL but it definitely runs small. I would honestly say it fits more like a medium, unless you like things really fitted. It's in good condition. It does look a bit fades but it looked like that way somewhat when I purchased it brand new. There is an area that seems to be slightly stained (see last picture) but it's really not bad. Any questions, please ask.