Features: brand Breast shells are made of soft silicone. Simply press it to your breast and you will collect the breast milk effortlessly. The breast shells are designed to be placed in your bra. These nursing shells protect nipples from friction and help with relieving engorgement. Breast milk collector storage. Compared with nursing pads, they help you collect precious breast milk leaks and relieve the discomfort and pressure of unexpressed milk. He design of air vent allows for airflow so the nipples can heal and be ventilated. It's also convenient for transferring milk to bottles. Size: approx 10x9.9cm/3.93x3.89 inches, fits most sizes of bra without influencing the appearance & easy to clean and sterilize & portable. Specifications: Material: Silicone Size: approx 10x9.9cm/3.93x3.89 inches Package Includes: 2x/Set Breast Shells note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item.