Descriptions: Material: food grade silicone Age of use: 0 months or more Cover Dimensions: S: 1.5cm M: 2cm L:2.4cm Appropriate size: Can adhere to the nipple nicely, enabling skin-to-skin contact with the baby, suitable size to assist you in breastfeeding, from the for latch difficulties to flat and inverted nipples. Soft and safe to use: made of soft silicone, lightweight and full of toughness, soft and safe for your babies and you to use. Practical design: proper curve allows the nipple protectors to fit a mother's nipple closely and firmly, wipe clean the nipple area with wet wipes before use, cover the breast with the protective cover, hold it down with your hands before breast-feeding. It will not easily fall off. Keep clean and store: you will get a carrying for case for convenient storage, and it is easy to keep clean and sturdy enough.