So, trying to find a good heavy weight fleece for wearing under my shell when on the go. I am thinking Polartec Thermal Pro, but have seen Polartec Hi Loft as well. Are they similar or is Thermal Pro better at trapping air and just less efficient with regard to breathability? And on a side note, I don’t see many people using Power Shield Pro for softshells anymore which is sad. Thanks.
Eric

