A sub-ohm vape tank is a tank that can be used at high power using high VG (vegetable glycerine) e-liquid. This e-liquid (usually called a shortfill) is thicker than the average e-liquid and requires a certain coil to wick the e-liquid properly. These coils tend to have bigger wicking holes and can withstand a higher wattage, which in turn creates thicker and warmer clouds. Sub-ohm tanks are great for people who vape at a lower nicotine strength and love exploring deep, layered, flavours. When sub-ohm vaping, you inhale the vapour direct-to-lung (DTL). Usually, people that vape using a sub-ohm kit prefer a lot of airflow to create thicker and tastier clouds.