With the Medela Easy Expression Bustier you can easily express with all Medela electric breast pumps and still have your hands free to do other simple activities. The Easy Expression Bustier is made from a soft cotton/elastane mixture which means it is stretchy and very comfortable against your skin. It can be machine-washed at up to 30 ?C. Easy Expression is available in four different sizes. To find out your correct size please refer to the ?Table of Size? at the image category.