This is a beautiful flex rod set for 4C hair and it shows the versatility of the hair which is something that I constantly stretch If you have 4C Hair here are a few tips to help retain length - Always keep your hair moisturized. - Never sleep on a cotton pillow. Always sleep on a stain pillow case or a bonnet - Always deep condition your hair before styling it - Try to do as many stretched styles as possible to prevent your hair from curling in on itself.