Folks:
I don't know for sure, but could it be one of those neoprene sleeves to temporarily cover body art? (E.g. do we know for sure Alex didn't get some tats, perhaps a sleeve, like Lee Van Corteza did?) A work colleague of mine recently got himself a sleeve (full arm tat) during the summer months, and since he wore short-sleeve collar shirts to work, he wore one of these neoprene sleeves to cover his arm art in his official capacity.
I don't know if that might be the case with Alex -- the possibility of tats -- hence why I'm posing the question. Anyone?
-Sean