Lansinoh Contact Nipple Shields Are Effective Tools To Help Address Short-Term Latch-On Issues Related To Nursing A Premature, Small, Or Ill Infant, Flat Or Inverted Nipples, Tongue And/Or Lip Tie, Or Overactive Let-Down, Until They Can Be Resolved. Special Cut Out Design To Maximize Skin-To-Skin Contact Ultra-Thin, Super Soft, Flexible, And 100% Silicone Bpa And Bps Free 24Mm Size, With A Protective Case For Hygiene And Convenience.