Is this made to be used overnight? How often should I use this?

This depends more on the user. If you’re the kind of person who can’t sleep without some kind of weight on your face / head, you’ll love using this nightly. However, there are also those who purchase this not for daily use, but for when they need the soothing power of gentle pressure (i.e. when they have migraines). If you’re new to sleep masks, we recommend going for our non-weighted sleep masks like the Manta AROMA Mask, Original Manta SLEEP Mask, Manta SLIM Mask, Manta MAX Mask, Manta Sleep Mask PRO and Manta SILK Mask.