Papa & Barkley's Transdermal patches are 3D-printed with rosin as the activating ingredient inside. Designed to provide slow release relief over 12 hours, they can be cut in half or pieces for less serious discomfort. Level of psychoactivity depends on ratio and location of patch. Discreet, convenient and reliable, these patches should be applied to any venous, hairless area of the body for best results. From California-based Papa & Barkley.