The U.S. Consumer Product Safety Commission (CPSC) announced in mid-March that over-the-shoulder baby slings can be deadly and warned parents to use them with caution. The warning came after more than a dozen babies died while using the slings, according to ABC News.

In response to the CPSC warning, Infantino LLC, the company behind one of the most controversial baby slings, has announced a recall of over one million baby slings that have been sold throughout North America.

“It does not matter how old your baby is at this point with the Infantino sling,” CPSC’s Scott Wolfson told ABC News. “Do not use it. This sling places the baby in a very deep part of the product. What is so dangerous is when the fabric covers nose and mouth or when baby is turned into the body of the mother and the airway is restricted.”

At least 13 babies have died while resting in the sling, including three this year, according to news reports. According to the CPSC, a child can suffocate when a sling’s cloth is covering its nose and mouth. Because of babies’ weak neck muscles, they are not always able to turn their head free.

In a statement, Infantino said, “We appreciate the actions by the CPSC today, and are committed to working with them as well as parents and caregivers to address concerns they may have with baby slings.”