Satin is well known for preventing wrinkles while promoting smoother, healthier hair and skin. It helps reduce friction and prevents brittle hair from breaking. The frictionless satin surface negates tugging and pulling on skin that can cause creasing and wrinkles on the face. The bifold overlapping pocket ensures that the Satin Pillowcases starts put during the night and does not move around while sleeping. Care Instructions: Machine wash cold with similar colors. Tumble dry on low. Iron if needed.