If you're looking to protect your natural hairstyles, hair bonnets are a staple to have in your arsenal. These sleep caps keep your curls luscious, defined, and hydrated while helping to protect hair from split ends and shield against frizz by reducing friction between your hair and your pillow while you sleep. While solutions like silk pillowcases can help, bonnets go the extra mile by fully encasing your hair, keeping friction to a bare minimum. Plus, bonnets lock in any products that you use on your hair before bed, which means that they actually absorb into your hair, not your pillowcase. Large- if your hair is up to waist or beyond shoulder if its very thick. XL- if your hair is below your waist and up to your feet also can cover it. If you have questions just chat us! Thank you!