I went back and had my wife (better with fabric than I) check both suits. The older suit had lycra on the shoulders as well. I hadn't noticed because the lycra on the all black was thicker than on the blue/black. She said that changing manufacturers or even different batches could account for it. Still I'm disappointed that no description anywhere indicates that the suit isn't Polyolefin throughout. I'm solving the problem of no insulation on the shoulders by purchasing a 3 mm vest.