YGREAT MATERIAL:The nipple shields is made of A-grade silicone, which is super soft, comfortable to the skin-friendly touch,lightweight and resilient. PROTECTING & REDUCING PAIN:Nipple shields are designed to address common breastfeeding problems, including flat or inverted nipples, short nipples, and those with bite difficulties, pain and excessive laxity. COMFORTABLE & EASY BREASTFEEDING:These contact nipple shields are designed with spiral mechanics to allow your baby to suckle at a natural rhythm and prevent nipple biting, making nursing as easy as possible for you and your newborn baby. BODY CURVES DESIGN:The nipple shield features a feminine breast curve petal design, a firmer base, and a faux areola bump to maximize skin contact between mother and baby. EASY TO CLEAN & CARRY:Each comes with a separate travel carrying case for hygiene and portability. Just place the nipple shield in hot water to clean.