This is a powerful combination which includes: Passionflower, Chamomile, Valerian root, and Ashwagandha. These are all herbs that have been traditionally used for their potential benefits in promoting relaxation and improving sleep quality. 
Additionally, if you're considering using any of these herbs, it's best to start with a low dose and monitor how your body responds. If you're already taking medications or have underlying health conditions, consult a healthcare professional before adding herbal supplements to your routine, as there can be potential interactions or contraindications.