Packer boxers have a special pocket in it specifically designed to hold a packer (prosthetic) in place, securely and comfortably without a harness or jockstrap. You simply drop your packer into the pocket, which is deep enough for both comfort and to maintain the visual appearance of being biologically accurate. Adjust to your comfort. You can have the balls of the packer inside the pocket, or outside touching your skin. You can also use an STP (Stand To Pee) device with Toni Marlow Packer Boxers. There is a fly in the front for access when using the washroom.