A Waist Trainer Vest will cover your entire upper body. Because these models contain latex you will sweat more in the areas covered by the vest. What a vest does extra for you in comparison with the normal model waistshaper is covering up your back and the sides of your breasts. Those annoying fat rolls over your bra strap on your back are smoothened out and you could actually reduce them when you take the waist training process serious. Also perfect for under your outfit to obtain a beautifully proportioned and leaner silhoutte.