Boppy pillows aren’t safe for infant sleep because there’s a suffocation risk. While you can use them supervised during the day, they’re not meant for napping or co-sleeping. Due to the inclined position, your baby takes while in the Boppy, there’s a risk of them falling asleep and then sliding down, which can block the airway. It’s for much the same reason that they shouldn’t be sleeping in their car seat.