Stone Island Shadow Project
Shadow Project is a sub-brand which focuses on urban designs, 'Technical' fabrics and a more muted palette than the standard Stone Island range. It is a collaboration between Stone Island and German designer label ACRONYM.
Acronym is a cult brand, which specialises in technical fabrics and performance designs. They grew out of a design consultancy, and this is still a large part of their work. The Business of Fashion site has a decent feature on them: Acronym's Uncompromising Focus on Function.