bad purchase for me [SEP] not sure these work for me i wanted to use them at night to sleep in so my curls wouldn t flatten out i didn t sleep much because it kept falling off it s so incredibly hard to get it on too while trying to keep your hair inside it i felt like my hair was sliding out all night not sure if these will get anymore use i did tighten it to my head but i was afraid i d have a mark around my head