Made of Food Grade Soft SiliconeThese nipple shields for nursing newborn are made of clear view 100% food grade silicone which is super soft, lightweight and full of toughness. The material is BPA-Free, non-toxic and harmless to humans. Protect Sore or Cracked NipplesThis Nipple Shields is carefully designed to address common breastfeeding issues like flat or inverted nipples and those experiencing latching difficulties, soreness and overactive letdown. Upgraded Contact Base DesignThe Nipple Shields for breastfeeding is designed with petal style which in line with human curvature. It is lighter & easier for nursing mothers to hold in place and maximizes mother-baby skin contact. Its imitating Areola convex point design gives baby more real contact with Areola. Upgraded Spiral Pacifier DesignThe spiral mechanics pacifier allows baby sucking breast milk under natural rhythm and avoid choking when feeding. Space between the nipple and pacifier prevents baby from biting nipple. Care Tip1. The nipple shields is heat resistant and you can use steam or boiling water to disinfect before use. 2. It is recommended to replace the nipple shields in 2-3 months for nursing health and hygiene. 3. Teething baby like biting nipple when breastfeeding, if the nipple part is ruptured damaged, you should replace a new one immediately.