Symple Stuff Acting much like a tight hug, this blanket will help you calm down and relax, guaranteeing a good night's sleep. The blanket is packed with tiny, hypo-allergenic, environmentally friendly glass beads measuring 0.9-1.1mm in diameter. The resulting delicate yet firm pressure reaches the deep-seated receptors and helps with the release of serotonin and endorphins, chemicals that your body naturally produces to make you feel calm and relaxed.