Lilysilk 25 Momme Oxford Envelope Luxury PillowcaseSilk pillowcases are basically an overnight beauty dreampreserving your blowout and helping to prevent fine lines and wrinkles. (Silk doesn't absorb moisture like cotton, so your creams stay on your face and oils stay in your hair.) Lilysilk comes highly recommended by product reviewers. There are less expensive, and more expensive modelswe think this Charmeuse Silk in a 750 thread count will do the trick. Comes in several colors, and can be