Worn twice Depending on your hair type, Sleepy Tie® will keep your previous style or add volume and slight curl overnight. Use Sleepy Tie® to protect your hair while sleeping or during day time activities such as working out, errands or self care appointments. To use Sleepy Tie®, you must be able to put your hair in a bun on top of your head. Sleepy Tie® is made to be used on dry, styled hair and is not to be used on damp or wet hair.