small rivers create large streams
In bodybuilding, mass gain is a period during which we will increase the volume of the muscle, which is characterized by weight gain.
The objective here is not only to gain muscle, but also weight. Nevertheless, it will be necessary to dissociate a gain of fatty mass (body fat) and lean mass gain (muscles).
You will therefore understand that it will be necessary to associate nutrition with training in order to increase calorie intake.
However, that does not mean pounce on any food because if increasing your mass without gaining muscle is possible (and even rather easy), gaining muscle without gaining fat is much more difficult that is why the Burnfitnes tank top help you to greatly in this step.