13 gear temperature control technology, more choices of temperature, the thermostat automatically cuts off the power for safer using. 2Using a heating cap can more effectively absorb the nutrients of the hair film and shorten the hair coloring time. 3The color is firm and uniform, improve the quality of hair dyeing, maintain the hair quality after perm damage, heat up quickly, and have high efficiency. 4Thick waterproof insulated inner liner, removable and washable, safe and convenient. 5Intelligent temperature control, 4row cable design, outer layer of wire adopts premium material, safe to use. 6The outer layer of the heating cap is made of PU fabric, which is thick, durable and easy to clean. 7With elastic rope can adjust the size of the cap at will to adjust to the comfort you want.