Nested Bean's Zen Sack markets a 'gently weighted' insert on the chest designed to simulate parental touch. However, weighted sleep products for infants are currently under CPSC investigation following safety concerns. The AAP has not endorsed weighted sleepwear and some pediatric sleep experts advise against added weight on infant chests. While the Zen Sack weight is relatively light (less than 10% of baby's weight), the safety principle is concerning. Many sleep consultants now recommend unweighted alternatives. Parents seeking similar 'touch simulation' might consider regular human contact during sleep training rather than weighted products. Proceed with caution and consult your pediatrician.




