Using crib bumpers is unsafe and not recommended. Crib bumper pads have been associated with suffocation deaths in infants. The American Academy of Pediatrics and other professional organizations recommend against the use of crib bumpers. If noise from head banging is a problem, try moving the crib away from walls. If the concern is about a baby injuring their head because of head banging, it may be helpful to discuss concerns with the baby's pediatrician.