The North Face Women's Inconceivable Jacket

I fell in love with the jacket online and was all too pleased and happy when I found out that a friend owns it and gave it to me for a trip to the woods. The jacket is great. BUT: the ventilation under the arms is so hard and inflexible that it really hurt whenever I let my arms hang down and especially with the packback on my shoulders.

Why would they make such a jacket?! It is on the very high end of the price scale and for that, I would have liked a jacket that does not give me blisters under my arms!