X MFG Shop Pull-Over

This high-tech long sleeve is warmer than it looks. Its insulation-to-weight ratio makes it the perfect piece of clothing to keep you warm in the shop without being bulky and snagging on tools, fixtures, and stock. 

I also heard that slick-looking chest pocket is the perfect size to hide a couple of NCR tags...

You can find more information about the garment here and here.