This item is an effective means of 'slimming' the abdomen and provides relativley comfortable support by 'binding' the chest and abdomen. On the 1st day I was asked by a colleague if I had 'lost weight', which I had, but because of the way I carry the weight it never looked as though I had... well now it does.
The main advantage of this item is the moisture wicking layer means that even in the busy emergency department in which I work, i remain quite cool and 'sweat free' even during the most strenuous tasks (like chest compressions).
Its main drawback is that the underside of the sleeves/in the arm-pit can 'dig in' and feel constrictive.
I would recomend this item and though the description of the item is for outer-wear, it is quite effective as a undershirt.