I have read the commentary here on the DIAD jacket and it looks like a great unit, but I need some feedback on sizing. I am 5'-11" tall, chest size is 46" and waist is 34". Underneath a DIAD I need to be able to layer the following combinations:
– thin wicking shirt only
– thin wicking shirt + Patagonia R2 fleece
– thin wicking shirt + Patagonia R2 + Patagonia puffball vest (rarely; coldest case)
Given the fit of the DIAD, do you think I should get a XLarge or 2XLarge?

