Comfort mummy cut efficiently maximizes weight without constriction ? Patent-pending welded Lamina construction enhances loft and eliminates cold spots ? Thermic Micro? fill ? Durable lightweight nylon shell w/DWR treatment ? Soft polyester lining wicks away moisture ? Full-length zipper w/double sliders ? Comfort footbox follows natural foot position for maximum warmth and comfort ? Face gasket and tailored hood comfortably blocks drafts at the hood opening and seals in warmth ? Internal zippered pocket at shoulder ? Nylon compression stuff sack and mesh storage bag included ? WEIGHT: 1.69kg ? TEMPERATURE RATINGS: -5?C comfort/-12?C limit/-31?C extreme.