Nipple Shield ( One piece)It goes over your breast and nipple and has tiny holes at the end where milk can transfer from your nipple to your babys mouth. It helps infants with trouble latching onto the breast by acting like a longer, firmer nipple. Its used as a short term solution when your baby is having trouble learning to breastfeed Made of quality soft and food grade silicone, safe to use. Ventilation holes create air circulation Washable or sterilized Fit a lot size of