The Sleeping Bag Coat is one of the classic icons of the Norma Kamali brand. Originally designed in 1973, the Sleeping Bag Coat created a frenzy among fashion-hungry style seekers. It remains as relevant and chic today as it was back then. Using the NASA method for warmth, each coat is actually two coats sewn together with air pockets in between. Heat from the body exchanges with the cold from outside.