Enjoy continued peace of mind from your Smart Sock 3 with the Owlet Extension Pack. 

The Owlet Extension Pack allows you to continue tracking your child’s heart rate, oxygen level, and sleep trends up to 5 years of age. The included toddler-sized fabric sock works with your existing Sock 3 sensor, and our optimized technology continues to provide accurate readings as your child grows, between 13kg to 25kg.

Continue to monitor your child through every milestone—from teething to toothfairy.

Requires the Owlet Smart Sock 3 Baby Monitor (sold seperately).