Highly recommend this long hooded vest. This keeps neck and center back snugged if that is where you carry your stress. It protects the lower back muscles from chill, protecting them from tightening up or muscle spasms after you've finally relaxed them if your back went out. It is excellent so you can carry on and your back last long- get out there and continue being strong. Superior.
I'm a university student where it's quite cold - having this vest means being warm both inside and outside. I am 5'6, weigh 135 lbs, and got an XS...it's still large enough to fit a hoodie underneath. I ran it through the washer and dryer to mitigate some of its initial stiffness, and I'm pleased with my purchase. One cannot place a price on being warm!