MAM Nipple Shields help if the nipples are tender or if it is difficult for the baby to latch on due to the shape of the nipple. Nipple Shields are designed in such a way that the baby can easily make skin-to-skin contact with the breast and feel the familiar smell of milk, these help the milk to flow and the baby's activity at the breast. Nipple Shields are made of very thin silicone, the suction part has the Skin Soft surface familiar from MAM pacifiers. The wings have a unique patterned surface, thanks to which they are very gentle on the delicate skin of the baby's face. The package contains two nipple shields and a convenient storage box, where the nipple shields can also be easily microsterilized wherever you have access to a clean microwave and water. More detailed microsterilization instructions can be found on the package. Two sizes: small 17mm = size S / regular 23 mm = size L. To choose the right size, you can get help from the packaging and the attached video https://www.youtube.com/watch?v=SQw4JfJPtQw# All MAM products are BPA/BPS free.