100% cotton swaddle to comfortably track your baby's breathing motion No electronics or sensors in the product, on your baby, or in the crib Prevents babies waking themselves up from the startle reflex Secure, quiet-open hook and loop attachments for the perfect fit Easy diaper changes - custom-designed elongated zipper makes nighttime visits a breeze Easy glide, pinch-proof, two-way zippers Hip healthy - widened leg area ensures baby has enough room Machine washable Size: Small (0-3 months / 6-15 lbs / 2.7-6.8 kg) Breathing Wear works exclusively with the Nanit Plus nursery camera, to monitor your baby's breathing motion without putting sensors on your baby. The specific patterns on the fabric were custom-designed to be read by the HD Nanit camera, making it easy to check in on your little one, from your Nanit app. Contains one small Nanit Breathing WearSwaddle. Expanded assortment available online. This product is not available in our stores.