I just looked it up on the Pertex website. There are 3 kinds of Shield - Shield 2, Shield DS, and Shield 3. Both the 2 and 3 have very good breathability - 20000 g/m2/24hrs. The Shield DS has much less breathability - 8000 g/m2/24hrs. Unfortunately both the Golite and the OR are made from this Shield DS. If there are any jackets out there made from Shield 2 or Shield 3, I would be very interested, because the breathability should be very close to eVent.