During breastfeeding, a nipple shield is a nipple shaped sheath worn over the aureola and nipple. The nipple shields from Morisons Baby Dreams are made of soft, thin, and flexible silicone. During breast feeding, use a contact nipple shield if your nipples are inverted, flat, or cracked. The unusual anatomical shape allows for the most skin to skin contact between mother and infant. It comes in a pack of two nipple shields that are BPA free.