Hair rubs on the pillow for hours every night. A bonnet or wrap keeps it in a smooth case, and a little product on the ends can make the morning easier. Results depend on your hair.
Satin or silk bonnet
A soft cap that keeps hair together and off the pillow. Good for long, curly or textured hair.
Look for
A double layer, so it holds its shape.
A wide band that is snug but not tight. A tight band leaves a mark and can slip off.
Enough room for your hair. Look for "large" or "jumbo" if your hair is long or thick.
An adjustable tie or band, if you are between sizes.
Skip it if you move a lot in your sleep and it falls off. Try a silk pillowcase instead.
Rough estimate, not checked Satin RM8 to RM30, silk RM40 to RM120