Adaptable Fit: The PersonalFit Flex breast shield allows you to easily adapt the fit to your breast shape, ensuring maximum comfort and efficiency during pumping sessions. Variety of Sizes: Available in four different sizes (21mm, 24mm, 27mm, and 30mm), allowing you to choose the size that best fits your breast for optimal milk flow and comfort. Soft and Natural Feel: The rim of the breast shield is made with a soft, natural-feeling material that lays smoothly on the breast, enhancing comfort during pumping. Improved Milk Flow: Designed with a 105 angle to improve fit and encourage better milk flow, preventing compression of the milk ducts for efficient expression. 360 Rotatable Oval Shape: The oval shape of the breast shield can be rotated 360, allowing you to find the most comfortable and effective pumping position. Clinically Tested: Tested in clinical studies with breastfeeding mothers, proving to deliver more comfort and efficiency across various pumping sessions. BPA-Free Materials: Made from BPA-free materials, ensuring the safety of both mother and baby during the pumping process. Overall, the Medela Personal Fit Flex Breast Shield in Extra Large size offers enhanced comfort, efficiency, and adaptability, making it an excellent choice for breastfeeding mothers who prioritize comfort and convenience during their pumping journey.