Before we get into the hows and whys of packing, let’s define what packing is. In this context, packing refers to the practice of somebody who doesn’t have a penis wearing padding or an object in their clothing, in order to give the appearance of having a bulge. Some people use the terminology ‘soft packing’ to refer to packing with anything that can’t - or isn’t intended - to be used for penetrative sex, in opposition to ‘packing hard’, which involves packing with a toy or object that’s also intended for penetration. In practice, however, people often use ‘packing’ and ‘soft packing’ to mean the same thing.
Packing is a practice with a long history, although until recently there were relatively few commercial products available, with some people using rolled up socks or hair-gel filled condoms. Now, however, there plenty of specifically made commercial options to choose from.