Pillowcase or bonnet
A pillowcase protects whatever touches it and stays put; a bonnet or scarf keeps all your hair on a smooth surface and holds it in place, which suits long hair, coils and twist-outs. Many people use both. Loose curls also do well in a high, loose pineapple on top of the head.
Looking after them
Silk usually needs a gentle cycle or hand washing and drying flat; satin polyester takes a normal wash. Wash either as often as you would a pillowcase, since oil and product transfer onto it.
What it won’t do
A smooth surface cuts friction; it doesn’t add moisture or repair ends. If curls are dry or breaking, look at the wash day as well.
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