Another important part of packing is making sure it does not move out of place, or even fall from your underpants. A possible option is using clips or velcro to attach it to the underpants. Most male underwear is designed to have a bulge, so the packer will fit just right. However, there is also specialized packing underwear, which is specifically designed to hold a packer. There are various models of packing underwear, with different designs and prices.