Medela is the #1 choice of hospitals and mothers for their innovative breastfeeding products like the Easy Expression? Bustier in White. ? Made with Oeko-Tex certified materials. ? Helps with hands-free breast pumping. ? Easy to put on with zip front closure. ? Compatible with all Medela electric 2-Phase breast pumps. ? Available in various sizes. ? Please see size guide for the best fit. ? 89% Cotton and 11% Elastane. ? Machine washable 30 degrees.