Sleeping in Your Hair System
Excessive friction and movement while you sleep can cause tangling, breakage, and shedding in your hair system. For most, this is not a problem. However, the longer your hair is, the more prone it is to damage. In order to protect your hair system, there are some preventative measures you can take before going to bed each night.
Use silk, satin, or high-thread-count Egyptian cotton pillowcases that will not absorb moisture from your hair, causing it to dry out and tangle or mat while you sleep. These fibers do not catch or pull on the hair cuticle like traditional cotton can. Do not sleep with a flannel pillowcase, as this causes excessive drying, tangling, and breakage, especially in longer hair.