waterproof performance with warm heatseekerâ„¢ eco insulation. the the north face namak jacket offers a waterproof and highly breathable outer material made from seam-sealed dryventâ„¢ 2-layer material. combined with recycled heatseekerâ„¢ eco insulation, this snow jacket will keep you warm, dry and comfortable throughout the day. generous pockets with a security zip, mesh-lined ventilation openings and adjustable cuffs round off this lined jacket from the north face.