Our Ultralight Jacket is perfect as an outer layer or underneath a heavy jacket for warmth in extreme cold. Ultralight PrimaLoft® Gold 60g insulation has an exceptional warmth to weight ratio, and retains 98% of its insulating properties when wet. The abrasion-resistant Cordura® ripstop nylon shell has an elasticized waist and cuffs to keep a low profile for easy layering. Soft, comfortable Moleskin-lined handwarmer pockets and collar facing.