Weighted blankets—or blankets of any kind—are never appropriate for babies under the age of 1. Unfortunately, there isn't any research out there about what age it’s appropriate to start using a weighted blanket with your child. That said, most older children are able to use weighted blankets throughout the night as long as they are the right size and weight for your child’s body. If you have any questions about using a weighted blanket while your child sleeps, consult your pediatrician.