The Picture Scape Jacket appears to be a goose or duck down filed jacket, but it is not, we assure you that no birds were used in the making of this garment. The Scape uses a synthentic down called Dupont Sorona, this insulation is a renewable sourced fiber made from plant-base materials. The advantage of Dupont Sorona is that it offers exceptional softness, excellent Stretch & recovery as well as being lightweight breathable & warm. Another notable advantage of Dupont Sorona is that the factories use less energy, compared to nylon 30% less energy in fact, while releasing approximatly 60% fewer greenhouse gasses.