Feature:1. Upgraded Design: The shell is built with an anti flow plug cover over the air outlet, so you can close the cover when you sleep and open it if you want to let fresh air in.2. Ergonomic Style: The ergonomic breast shell protects nipples from friction and prevents milk from escaping, fits most underwear sizes and does not affect your daily aesthetics.3. Thoughtful Shells: The improved design keeps you from being burdened during travel or daily work, and can help nursing mothers avoid the embarrassment of wetting their clothes with milk.4. Comfortable Silicone: Wearable breast milk collector is made of soft food grade silicone material, comfortable and skin friendly, no irritating odor, safe and reliable.5. Capacity Scale: The breast shell is engraved with a volume scale, so you can easily observe the storage capacity and feed the collected milk to the baby.Specification:Item Type: Wearable Breast Milk CollectorMaterial: SiliconeProduct Size: Diameter: Approx: 9.6cm/3.77inAperture: Approx: 3.3cm/1.3in.Package List:2 xBreast Milk CollectorNote:1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.