Its not allowed to post store but in Norway i tired this one and put some extra padding around the rope and it was completely pain less when i tried so the rope should be thick and slippery soft with even texture and using clothes around the rope made it work in seconds i was just going to test it that day but i didnt even want to stop since it was like when you count down during a surgery and just feel yourself close down with peace. Dont use hard rope or thin rope.