When you sleep with the satin cap on, your hair stays hydrated and nourished for longer, you can have a better day after, because as satin is a thin and soft fabric to the touch, it absorbs less moisture from the strands, keeping hair integrity, and also for those with brittle hair, it is a great option, as it helps to reduce hair breakage, but best of all, the hair is less tangled and less frizzy.
It makes it a lot easier when you wake up because the curls will be very easy to revitalize, often only needing a drop of vegetable oil in your hands to give that fix.