Designed to gently grasp flat, inverted, or difficult nipples, and protect sore or cracked nipples, helping mothers continue breastfeeding. Ultra-thin and ultra-soft design, 4-hole nipple design, ultra-soft, lightweight and flexible, seamless one-piece design without seams, cracks, or edges. Made from food-grade silicone, BPA and BPS free, to meet various maternal needs. Extended length suitable for all nipple sizes. Lightweight and flexible, symmetrical butterfly design makes it easier for mom to keep in place. Anti-rib outer edge design makes the nipple shield easier to hold while feeding. Combined with an ultra-thin design to meet various maternal needs. Upgraded nipple design, variable nipple with cross-holes to prevent choking if milk flows too quickly. The space between mom's nipple and the nipple shield head prevents baby from biting the nipple. The nipple design allows your baby to mimic the natural sucking rhythm, making it easier for babies who have difficulty latching. The unique shape and ultra-thin silicone nipple allow for more skin-to-skin contact between mother and baby. It can also be warmed to mom's body temperature for a natural feel. Comes with a carrying case for easy storage.