Fort Point Beer Company: Nitro

Official description from the brewery:
Nitro was inspired by cool summers in San Francisco, where outdoor adventures often come with fog. Best enjoyed infused with nitrogen, this beer is light, daring and thirst-quenching, but a double-roasted malt brings in fudge and molasses notes to keep things toasty. This is a beer for a cozy evening at home with a book and blanket, or a few friends and a good conversation.