A prospective, randomized, 2-phase/crossover, single center premarket feasibility study. In phase I the comfort will be assessed, the occurence and types of adverse events will be recorded and the assessment how and if the different breast shield designs interact with the lacting breast during pumping. Phase II takes place at home; assessment of adverse events will be recorded and the assessment how the subjects perceives the comfort of the soft edge breast shield during mid term use at home.