Are Silk Pillowcases Really That Good for You? We Asked a Dermatologist

While silk pillowcases are less absorbent than cotton pillowcases, board-certified dermatologist Dr. Anna H. Chacon, MD points out that you still need to wash them just as often.

"It is more than important to evaluate the state of your pillow and bedsheets," she says. "Try to wash them at least twice weekly, so that residual oils do not contribute to breakouts or additional acne flares."

Oh, and be sure to choose your detergent carefully: "If you have sensitive skin, or are generally prone to acne, you should also check the type of detergent or dryer sheets you may be using," says Dr. Sobel.

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