Owlet Smart Sock 3 is an award-winning Smart Sock that tracks important indicators of your baby’s well-being so while they rest easy, you can, too. The Smart Sock tracks your child’s heart rate, oxygen level, and sleep trends. View your child’s readings in real time with the free Owlet Care App and receive notifications if readings leave preset zones. For ages 0-18 months. Available in Mint and Dusty Rose.