This Super/DS is the ideal down jacket for climbers: lightweight insulation that is mobile, durable, and warm. Its stretch-baffle construction represents a new movement in down technology: the first puffy to weave face, back and baffles from a single fabric. With no bulky glues or delicate stitches, the woven baffles provide exceptional flexibility and durability, while reducing cold spots and down migration. The result is a down jacket with durable stretch.