Silk vs cotton: Which pillowcase is better to aid hair growth in winter?

Wake up to frizz-free and smooth-looking locks every day, every morning, with the help of a silk or cotton pillowcase. But how do we know which is better than the other?

Silk vs cotton: Which pillowcase is better to aid hair growth in winter?
Wake up to frizz-free and smooth-looking locks every day, every morning, with the help of a silk or cotton pillowcase. But how do we know which is better than the other?