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The friction of your face on fabric can lead to sleep lines, which over time, with repeated pressure, can develop into more permanent facial lines.

Dr Anna Chacon

They also do a better job keeping your skin hydrated because they absorb less moisture than cotton pillowcases.

Dr Brendan Camp

Sleeping on silk can be helpful for sensitive skin because it is lightweight, breathable and non-irritating, while reduced friction may also mean less frizz.

Dr Hadley King

Sleep creases can be caused by the skin crunching against a pillowcase and breaking down collagen and elastic tissue.

Dr Debra Jaliman

The friction against your pillowcase can cause hair to break. Swapping a cotton pillowcase for a satin or silk one can help.

Dr Shilpi Khetarpal