You can roughly distinguish between two types of wax: hard wax and soft wax. *Hard wax (also called hot film or resin film) is used on the most sensitive body parts (bikini, armpits, face) and soft wax is used for the rest of the body. Hard wax adheres only to the hair and not to the skin, as it naturally becomes hard. *Soft wax is removed with cotton strips after a thin layer has been applied to the waxing area with a metal spatula (legs, arms, chest, back). When using soft wax, the wax does not need to harden in order to remove hair.