The Men's Patagonia Sisar Down Jacket is an insulated jacket for cold weather days. This collared jacket is built with a 100% recycled nylon ripstop shell for rugged days outdoors, while a recycled polyester taffeta allows it to slide on easily over a sweater or hoodie. Stuffed with an ample amount of 600 fill power down, you'll be toasty warm when the temperature drops this winter.