A 1:1 ratio means that your cannabis product contains (ideally) an equal amount of Delta-8 THC and CBD. These are the two main compounds found in the cannabis plant. The practical mix of a THC and CBD vape pen offers what we call the entourage effect, meaning these two cannabinoids work synergistically to be more powerful together than they are alone. THC binds to CB1 receptors and calms the nervous system, whereas CBD binds to CB2 receptors and calms the immune system.