Bonus points for explaining the question title.
Reading direction is top-to-bottom and outside-to-inside!
It's a high-quality, all-organic t-shirt!
For the interpretation of the innermost parts, it may be beneficial to know a little about recent german tech-industry news.
If you left out any major visual element of the picture, you may have to re-think your answer. ;-)
Forget about the pattern-and-cheese part of the riddle for a moment - it only holds 20-25% of the solution and is independent from the rest. And it's admittedly the most difficult part.
We are not looking for the owner of this t-shirt - but if we were, it wouldn't be Igor Fyodorovich Stravinsky, Wolfgang Amadeus Mozart, or Edvard Hagerup Grieg.
What's the most used collar style of a simple t-shirt? And what's this?