Amazon posted reviews are not for this item
I bought this item to help with chronic neck pain from forward head posture, and was sold by the Amazon reviews.  My mistake because I should have paid more attention, but most of the reviews are actually not for this item.  The item seems to be sturdy, and it does help with posture while I am wearing it, thus relieving the neck pain.  But unfortunately I traded in neck pain for under-arm pain!  The part of the straps that go under the arm are too wide and stiff, easily irritating this sensitive area.  I am going to see if I can modify it somehow myself, but the product as is cannot be worn for more than a few minutes at a time.
Rating: 3 stars