Peace of mind while you sleep from newborn to 18 months. Tracks oxygen level, heart rate (bpm). Dream Sock is intended to assist caregivers in tracking their child’s well-being by monitoring sleep patterns, quality and duration of sleep. When enabled (in-home use on healthy infants only), Dream Sock displays pulse rate (PR) and oxygen saturation (SpO2) values and provides a notification in the rare instance that the values move outside of a preset zone.