Our award-winning Smart Sock goes beyond the capabilities of any other baby monitor to monitor the things that really matter, when it matters most. Pros. Let’s start with the sensor (one of the thoughtful bits). The full Owlet Smart Sock 2 package costs $299.99. Owlet Smart Sock 3 DUO Pros/Cons. The newest design (Smart Sock 3) promises a better fit for the baby’s foot and improved accuracy; Peace of mind knowing that alarms will notify you … Additionally, Owlet … Parents around the world trust Owlet every night to help them keep their babies safe while they sleep. Amber Bouman/Engadget. What had been a flat circular … Quick, wireless charging delivers a fully charged Smart Sock … Owlet also offers a payment plan with Affirm, so you can slowly pay off the device with payments as low as $25 per month. Smart Sock 3 has been completely redesigned to accommodate more babies, from 5 to 30 pounds, and continues to track Baby’s heart rate and oxygen through gentle motion. You chose between Mint, Blue, and Pink for the sock color. Our newest Sock … The sensors included with the Owlet Smart Sock 2 (left) and 3 (right).