Topo's answer to the everyday winter coatpull up the hood for casual chilly days around town, or fully zip up with the combined snap placket to keep extra warm in colder alpine environments. The Mountain Jacket is insulated with PrimaLoft Black Eco Insulation, a sustainably built synthetic fill that performs like down. PrimaLoft Black Eco Insulation is made from 100% recycled plastic bottles to keep you warm while keeping plastic out of the landfill.