When it comes to Oil, you reap what you grow. At Harmony they use only pure CO2 to create their oil, free from any hydrocarbon solvents. They run strain specific batch extractions with the highest grade material to get the purest, best tasting oil possible. Next they refine the oil through a cold filtration process which removes all the plant waxes and impurities. They then gently heat the oil to activate all the cannabinoids, making it ready for cartridges.