it's mostly trial and error and trial again. completely eliminating any circulation is going to make you cold and clammy. You may need a good base layer and jersey that will wick away moisture faster than what's being done now. That's a great jacket, it just may not be the one for you, who know. If they won't take it back, or you can't get a good exchange deal worked out, sell it here or on ebay, or just try more alternatives under the jacket.