The main ingredients are USP Grade Propylene Glycol 55%(PG) and Vegetable Glycerin 45% (VG). This gives us the perfect combination of throat hit, vapour and flavour
Below is a great video explaining PG and VG which are the main ingredients in KIKIT E-Cigarettes

General Information on Propylene Glycol (PG)

Produced from Propylene Oxide Propylene Glycol is an organic compound produced from Propylene Oxide. Basically colorless, completely odorless, and is thin in viscosity. Only USP (United States Pharmacopeia) Grade PG is used in KIKIT E-Cigarettes and is recognized safe by the U.S. Food and Drug Administration.

Propylene Glycol is widely used in the household as solvents, humectants, preservatives in food, tobacco products, pharmaceutical products, and of course e-juice.

General Information Vegetable Glycerin (VG)

Being an all natural liquid, Vegetable Glycerin is generally extracted from plant mainly, soy, coconut oil, and palm oil. It is clear with slight color, odorless, and can be sweet sweet, and relatively viscous.  It is considered safe by he U.S. Food and Drug Administration. The main applications of Vegetable Glycerin are cosmetics products, food production, and e-juice.