A nipple shield is a nipple-shaped sheath worn over the areola and nipple during breastfeeding. Modern nipple shields are made of soft, thin, flexible silicone and have holes at the end of the nipple section to allow the breast milk to pass through. Older nipple shields were made of latex and harder, thicker plastics, and often caused more problems than they solved

Nipple shields are used in various situations:

• Some mothers have small or inverted nipples which make it difficult for the baby to latch on. Using a shield allows for feeding to progress until the baby's suction draws out the nipple.
• Small, weak or sick babies often have difficulty latching on to the breast. A nipple shield makes latching easier and prevents the baby becoming discouraged.
• Babies who had to be bottle-fed since birth can become used to the bottle teat. Nipple shields feel more like teats, and aid with the transition to breast feeding.
• A mother's nipples can become sore or cracked from breastfeeding. A shield allows the mother to continue breastfeeding until her cracked nipples heal and she improves her latching technique.
• They make it easier to measure the quantity of milk consumed.