Be sure your hair is completely dry before going to bed, since even a bit of dampness can cause waves or frizz overnight. Use shampoos and conditioners labeled “smoothing” and don’t contain sulfates, which dry out your hair and make it frizzy.

Comb the product through your hair with a fine-tooth comb to ensure that you get every strand coated.

In the morning, remove the bun and brush out your hair until it’s straight. This technique works best combined with others, such as sleeping on a silk or satin pillowcase or using overnight straightening serums.

If you’re using powdered dry shampoo, use 1 or 2 shakes of powder at your roots and begin massaging it into your scalp. Add more to different places on your roots as needed.

For added volume, secure your hair in a top-knot, loose bun, jumbo rollers, or braids after applying the tonic.

Look for silk or satin pillowcases online in department stores where bedding items are sold. Even if you do not use a scarf, it’s still recommended you wrap your hair to minimize tangles while you sleep.

If you have a side part in front, you can create a middle part there as well to have an equal amount of hair in both sections, but it’s optional.

It may help to loosely tie a hairband around 1 side to keep it from joining the other side as you start the next step.

If you have a left side part, wrap your hair going to the right. If you have a right side part, wrap your hair to the left. If you secured either section of hair with an elastic band while parting it, remove the band before starting to wrap your hair. If your hair is very long, you may need to wrap each section around the front of your head and then back toward the back again. Be sure to keep it tight against your head.

If your hair is very long and you had to wrap it around the front of your head too, you may need to add a few more curved pins to secure all of it in place.

Large wrapping bonnets are also available, but these may allow too much room for your hair to move around and are better used on large braids or locks. Try to stick with a scarf that you can wrap and tie firmly to your head.

The scarf will hold your pins in place and prevent your hair from moving while you sleep.