“stiff plastic strip running along zipper”

“Although it is a good price for this brand, and seems warm, there is an unfortunate plastic strip---stiff and crunchy--that runs the length of the zipper. Even though it is encased in nylon, it still makes for an uncomfortable experience--particularly in a mummy bag, where your bodyis right against the zipper. Other bag reviews I read while researching mentioned this but this one's didn't.But I think people would want to know. I am planning to retun it. Too bad because the bag is great otherwise.”