We wanted to produce the best insulated jacket so we teamed up with Mother Nature and created, PROIS Super Down. We believe down is the single, best insulation that exists. Regular down clusters...trapping pockets of air that insulates keeping you warm and comfortable unless wet. Then, the air-trapping pockets deflate losing their ability to insulate. Being cold and wet is no fun... PROIS Super Down repells moisture while maintaining loft, temperature range, and packability.