Lightweight wool insulation makes the Wool Aire Sweater a powerfully warm, and comfortably insulating piece. With a lean semi-fit cut, this jacket works well alone or under a shell, it stays warm when wet and it packs down small to fit in a pack or to serve as a travel pillow. Reverse coil full zip. Back length from top of shoulder=29 1/4'' (size L). 7'' hand warmer pockets & 6'' chest pocket. Adjustable hem with cord lock system; elastic cuffs. Interior mesh pocket that doubles as a stuff sack. Shell: 100% Recycled Nylon. Lining: 88% Recycled Rip Stop Poly, 12% Regular Poly Double RipStop. Fill: Swiss Insulated lightweight wool insulation 90% Australian Merino Wool, 10% Polyester.