Cotton Imported SENSOR-FREE BREATHING MOTION MONITORING: The custom-designed pattern on Nanit Breathing Wear is tracked by the Nanit Plus Camera to see your baby's breathing motion without any electronic gadgets touching your baby's skin. 24/7 PEACE OF MIND: See your baby's breaths/minute in your Nanit app, in real-time. Should they ever need you, Nanit will sound an alarm on your camera and in your app. SOFT, SAFE, SIMPLE: The Nanit Sleeping Bag is comfortable for babies and comforting for parents. 100% cotton, no electronics, machine washable. Designed to be worn over pajamas, it can also replace loose blankets, making the crib a safer place for your baby. GROW WITH YOUR BABY: Nanit Sleeping Bags come in 3 sizes to fit babies from 3 to 24 months and is the perfect way to transition away from a swaddle once they start rolling. We recommend sizing up if your baby is getting close to the next size. HSA/FSA ELIGIBLE. Purchase Nanit Breathing Wear with your Health Savings Account or Flex Spending Account.