Fabric: leather fabric Hat mouth: elastic band Suitable for head circumference: 55CM-62CM 21.6inch to 24.4inch. Use method: cold therapy hyperthermia, microwave heating, refrigerator refrigeration Packing list: 1 Heating Uses: The Microwave Heating Method: 1. Rinse your hair so that no residue remains on your hair. 2. Apply hair care products evenly to your hair. 3. In order to avoid the situation that the is broken, it is recommended to wrap the with dry towel and then heat it. Use microwavable heat cup should use the temperature with medium heat for 2-3 minutes. Because the power of the microwave oven is different, the heating time will be different. For the first time, it is recommended to heat for 30 seconds and then the cup and test the temperature. Then you can heat it again. Take 30 seconds as unit, the maximum time of total heating should not exceed 3 minutes, so as not to damage the care . After mastering the time, you can heat it once again. 4. You need to use shower to wrap your hair and then wear care . 5. The nursing time is usually about 10-20 minutes, and finally take off the , wash the hair in warm water. Refrigerator ice therapy: 1. Rinse your hair so that no residue remains on your hair. 2. Apply the hair evenly to the hair care product. 3, Put the care into the refrigerator for 1 hour, you can take it out. 4, You need to use shower to wrap the hair, and then put on . 5,The nursing time is generally about 15-20 minutes, and finally take off the , you can wash in warm water.Elasticity:The hot treatment cap has elastic rim, memory and can maintain good efficiency and shape after continuous use. Suitable for head circumference from 21.6inch to 24.4inch. Safe: The Cordless Heating Cap is not need for electrical outlets or batteries. Hair steam cap is warms up by simply placing it into the microwave for about 1min (30 seconds for the first heating), increase by few seconds if it's not warm enough. High Quality Materials:The fabric of both side are premium quality suede,this gives the heating cap the excellent levels of breathability, and an additionally comfortable soft touch. Function: This heating cap has flaxseed in each top. After heating for period of time, it can effectively maintain heat and promote healthy hair growth. Eco-friendly:Reusable and can be reheated time and time again. Cordless, lightweight design, let you use it in daily housework or leisure time, portable and free to move.