I purchased this item with some hesitation that it could do what I needed it to do...to tuck in the tummy a bit and improve my posture when standing, walking and sitting.  I wore it 8 hours the first day and now after three days I am extremely pleased with its quality and effect on posture.  It runs true to size, providing your gut is not too big.  I'm 10-15 pounds over optimum and it took a little work to get the vest on the first time...but it is easier and easier without compromising the garment.  It seems to be very well made and if it could have torn apart, it would have done so -- but has demonstrated its quality and durability.  It is warm in the cooler weather....haven't tried it in warmer weather yet, but who cares, by then I'll look like Charles Atlas  (<: