Adaptable Fit: The PersonalFit Flex breast shield allows you to easily adjust the fit to find the most comfortable and efficient position for pumping. This flexibility is especially beneficial as your breast shape changes over time. Multiple Sizes Available: Available in four different sizes (21mm, 24mm, 27mm, and 30mm), the breast shield ensures a personalized fit for maximum comfort and pumping efficiency. The fitting guide provided helps you select the size that best suits your needs. Improved Milk Flow: The breast shield is designed with a 105 angle that improves fit and encourages better milk flow. This helps prevent compression of the milk ducts, leading to more comfortable and efficient expression. 360 Rotation: The oval shape of the breast shield can be rotated 360, allowing for flexibility in positioning and ensuring a comfortable fit for every user. Soft and Smooth Rim: The rim of the breast shield is made from a soft, natural-feeling material that lays smoothly on the breast, providing enhanced comfort during pumping sessions. Clinically Tested: Developed with the input of research scientists and breastfeeding mothers, the PersonalFit Flex breast shield has undergone rigorous clinical testing to ensure superior comfort and efficiency. Clinical studies have demonstrated its effectiveness in delivering more comfort and milk flow efficiency. BPA-Free Materials: Made from high-quality, BPA-free materials, the breast shield prioritizes the safety and well-being of both mother and baby. The Medela PersonalFit Flex Breast Shield in size Large (27mm) offers a comfortable, efficient, and personalized pumping experience, allowing breastfeeding mothers to express milk with ease and confidence.