Our newest Sock … The full Owlet Smart Sock 2 package costs $299.99. Owlet Smart Sock 3 DUO Pros/Cons. Pros. You chose between Mint, Blue, and Pink for the sock color. Parents around the world trust Owlet every night to help them keep their babies safe while they sleep. Quick, wireless charging delivers a fully charged Smart Sock … Additionally, Owlet … 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. What had been a flat circular … Owlet also offers a payment plan with Affirm, so you can slowly pay off the device with payments as low as $25 per month. 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 … 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. Amber Bouman/Engadget. Let’s start with the sensor (one of the thoughtful bits). The sensors included with the Owlet Smart Sock 2 (left) and 3 (right).