The U.S. Consumer Product Safety Commission (CPSC) issued a warning about sling carriers for babies in March 2010.
The CPSC advises that parents be cautious when using infant slings for babies younger than 4 months old. Over the last 20 years, the CPSC identified at least 14 deaths linked to sling-style infant carriers.
A baby can stop breathing and die if his face is covered, if the baby is hunched with his chin touching his chest, if the baby is too low, or the baby's face is pressed tight against the fabric of the sling.