The Philips Avent Breast Shells set has been designed to help you feed your baby longer with comfort. The set includes two comfortable breast shells that offer protection and comfort. The two ventilated breast shells are used to prevent sore nipples and ease engorgement. The breast shells also act as milk savers to collect leaking breast milk. The breast shells from Avent conform to the shape of the breast and come with two ultra-soft backing cushions for comfort. The Philips Avent Breast Shells are useful and hygienic and can be used during breast feeding.