Avent - Nipple protectors - 2 pieces. Protect sore nipples or nipples with stretch marks during breastfeeding. Specially designed, so as your baby has natural touch with your breast. Made of soft, odourless and really thin silicone. The nipple protectors are designed only to protect sore or with stretch marks nipples and must be used upon doctor's advice. Protects sore or cracked nipples during breastfeeding. Keep nursing baby while you heal. Narrow design lets baby smell your skin. Made of odorless, flavorless silicone. Can be sterilized by boiling or steaming.