Product name: nipple protector Material: food grade silicone Age of use: 0 months or more Instructions: Wipe the nipple and areola with a wet tissue before use, cover the breast with the protective cover and hold it down with your hands before breastfeeding. After use, please wash it with clean water or put it in a sterilizer for disinfection. Cover Dimensions: S: 1.5cm M: 2cm L:2.4cm Applies to: 1. Those with flat or sunken nipples (difficulty breastfeeding) 2. Pain during breastfeeding (wounds on the nipples) 3. The baby has difficulty sucking milk 4. The baby is teething Precautions: Rinse and disinfect with hot water before use. Do not boil, soak in boiling water, otherwise it will change the taste and deform. After long-term use, if there are bite marks, cracks, expansion, etc., replace it immediately.