"System D" is Neuwirth's term to describe what others have called the "informal economy", "the gray market", or the "underground economy." Any good or service that is bought or traded outside of ...

The Dainese D-System D-Dry jacket is unique in that it features a more extensive venting system than most other jackets of this type, but the D-Dry liner acts as the water- and wind-resistant barrier.

System D is the underground or gray economy where approximately 20% of the world’s population works and is about 20% of the world’s total economic activity. The term System D is adapted from the ...