The crib for your baby must have slats or bars no more than 2-3/8 inches apart, no unsafe design features, and a snug-fitting mattress. To avoid blocking your baby’s breathing, do not have pillows, crib bumpers, large and fluffy toys, blankets, or loose plastic sheeting in the crib, bassinet, carriage, or playpen. Cover the mattress with a waterproof cover, quilted pad, and well-fitting, soft baby sheet. Healthy infants should be placed on their back when put to sleep. Do not allow your baby to sleep in a rocker. Always be with your baby while he is on a flat surface above the floor unprotected by side rails, to avoid injury from falls.