Some UK retailers have stopped selling child sleep positioners amid concerns over their safety.
A US health regulator said they “can cause suffocation that can lead to death” and have been linked to 12 infant deaths in the US.
The positioners, is targeted at babies under six months, are intended to keep a child in a specific position while sleeping.
Mothercare, John Lewis, eBay, Boots and Tesco have stopped marketings, but they continue to can be found at other retailers.
John Lewis told perturbed customers on Twitter that the popular Sleepyhead pod and Cocoonababy nest products are not considered sleep positioners and are therefore still for sale.