I get an ideal hat for mistreated hair that needs care, you will get extraordinary results using this seed hat. The hats are not removable but include a protective plastic cap so they do not get stained while you are wearing it. Non-removable sleeping bag but has a waterproof cover bag to heat, put in the freezer or store. Dimensions : one size It is recommended to heat the hat in the microwave for 1 or 2 minutes depending on the power of your microwave. Apply the mask to freshly washed hair, put on the plastic shower cap that comes attached to the seed cap and then the seed cap, leave it on for 15 or 20 minutes and finally rinse your hair. The next day use it cold with dry hair and directly, to close the cuticle. You will also provide elasticity, strength and shine. It is recommended to do it 2 or 3 times a week.