THC 9.31MG CBD 9.39MG Onset: 15 – 30 minutes Duration: 8 – 12 hours Dosage: Apply as needed Mary’s award-winning transdermal patches are born out of a commitment to accurate dosing and the application of advanced delivery methods. Offering a quick onset and unsurpassed duration, Mary’s patches are 2×2 squares, easy to use, and adhere simply to any venous part of the skin for discreet, all day (or night) relief.