I don't often post merchandise as News, unless it is something really interesting or creative... so this might interest others as well - Adult hoodies done up as Gen1 Optimus (with face plate) and Gen1 Grimlock (with teeth around the hood and claws on the arms).

Grimlock appears to be sold out in all sizes already, but they might make more. The company selling these has been around for a number of years, and make licensed clothing, so these should be both officially licensed (they claim it in the descriptions as well).