The Super/DS™ is the first down puffy to weave face, back, and baffles from a single fabric. Basically, that's just a fancy way of saying there's finally a jacket made without constricting glues or delicate stitches. (Read: more breathability/flexibility, less cold spots/down migration.) Before, if you were a climber at the Red River Gorge in the fall or warming up at the boulders before the sunrise, you would've had to sacrifice movement for warmth. Now, you'll never have to.