Babies have suffocated while being carried in slings. They’re at risk if they’re placed incorrectly — they can’t move out of dangerous positions which block their airways. Babies who are low birth-weight, born prematurely, or have breathing problems such as a cold appear to be at most risk.
The Ministry of Consumer Affairs has advised against using a bag sling, which is shaped like a bag with a narrow strap. The baby can’t be placed in a safe position and can suffocate. The ministry also warns against using a sling that places the baby in a foetal position or lets the baby lie with a curved spine with their chin tucked against their chest: these positions block the baby’s airways.