Add some style to bedtime with an extra bundle of fabric socks for the Smart Sock 3 baby monitor. This bundle comes with a total of four fabric socks, and are a fun way to personalise your Smart Sock and ensure you’ll always have a clean pair of socks on hand. The Owlet Smart Sock 3 wraps comfortably around your baby’s foot to safely track Baby’s sleep quality indicators. The Smart Sock 3 is the only baby monitor to use heart rate and oxygen level in this manner, while also tracking wakings, current sleep state, movement, and more. View these indicators, including live heart rate and average oxygen level in the Owlet App.