Cotton is sanding your edges down every night

This is the shortest article on the site because the advice is one sentence: stop sleeping on cotton.

Everything below is just the reason.

What cotton does for eight hours a night

Cotton is absorbent and its weave is comparatively rough. Two consequences, both bad for a hairline that is already under pressure:

It pulls moisture out. Cotton wicks — that is what makes it good for towels. Against hair all night it draws out the moisture that keeps strands flexible, and dry hair is brittle hair.

It creates friction. Every time you turn over, the weave drags across your hair. On the fine, fragile hair at your edges — the hair most likely to be recovering from tension — that drag is mechanical damage repeated for eight hours, every night, for years.

Neither effect is dramatic on any single night. That is exactly why it goes unnoticed.

Why it hits edges hardest

The perimeter hair is the finest and shortest you have. It is also the hair most likely to be already stressed from tight styles and tension.

So the friction lands on the hair with the least capacity to take it — and it lands there nightly, undoing whatever daytime protection you are doing.

The fix

A satin or silk pillowcase. The fibre is smoother and far less absorbent, so hair slides rather than drags and keeps its moisture.

Or a satin-lined cap or durag — worn loose. The lining matters more than the item: a cotton-lined durag defeats the entire point, and a tight one causes the tension problem you are trying to avoid.

Doing both is fine and slightly better. Doing either is most of the benefit.

Silk or satin?

Satin is a weave, silk is a fibre — you can have satin made from polyester, which is why satin is usually much cheaper.

For this purpose the weave is what matters. A polyester satin pillowcase delivers nearly all the benefit at a fraction of the price. Silk is nicer against skin and more breathable if you want to spend more, but do not let the choice stall you.

Why this is on a hair-loss site at all

Because it is the highest ratio of benefit to cost available to you.

Minoxidil takes six months and daily discipline. A dermatologist takes an appointment. This takes one purchase and no behaviour change whatsoever — you were going to sleep anyway.

It will not regrow a hairline on its own, and anyone claiming otherwise is selling something. What it does is stop you losing ground every night while you work on the things that will.

That is worth the price of one tub of fibers.