Collect leaking milk during single pumping/expressing/feeding with these shells that can be worn under the bra. Discreet, these shells are made of soft, flexible silicone membranes with a spout (for easy emptying). No ventilation holes mean that the product is not supposed to be worn for long periods of time. - No precious milk is lost as leaking milk is collected during single pumping/expressing/feeding - Secure and discreet, can be worn under the bra - Easy to empty thanks to the built-in spout - Soft, flexible silicone membranes provide a comfortable and snug fit - No ventilation holes mean that the product is not supposed to be worn for long periods of time - Safe materials for you and your baby