North Face Thermoball Hoodie Mens Synthetic Fill Jacket Blue All Sizes. Get ultimate all weather versatility in this do it all midweight jacket featuring Thermoball insulation, which is just as compressible as down and insulated even when wet. Body mapped Thermoball insulation: 11 g/ft2 throughout the body, 9.5 g/ft2 under arms, 13 g/ft2 in collar …