Bundle + Save, when you buy 4 bottles we will give you 1 bottle free and FREE SHIPPING! CBN is created when THC-A oxidizes. CBN can be used effectively as a sleep aid or sedative. We've taken our full-spectrum CBD oil and have added an extra 300mg of CBN to it, to give you an extra sleepy effect. Take this oil 30 minutes before bed for a restful night of sleep.