Instruction: This product is Self heated and Reusable , it will make your hair evenly heated in oil or conditioner, also can apply to hair care at home, dye hairs , hair cap ,and more Usage: 1. Wash your hair first with shampoo, dry hair to 80%. Apply oil or conditioner evenly to hair. then wear the shower cap. 2. The hat will start to heat, it will be better to last 15-20 mins. 3, Rinse your conditioner off . Item: Aluminum Foil Cap Material: PE aluminum foil Weight: 15g / piece Size: diameter: 28cm, caliber: 11.5cm Package contain 1 hair cap