How should I sleep with hair extensions?

• Clip-ins and halos: take them out before bed. Sleeping in them wears out both the extensions and your own hair.
• Tape-ins, sew-ins and other installed hair: brush out tangles and make sure your hair is completely dry, since wet hair mats overnight. If you wash at night, blow dry it at least 80% of the way. Then sleep in a loose braid or low ponytail on a silk or satin pillowcase.

Want to go deeper? Satin Dreams: Sleeping in Your Hair Extensions