Made of high quality pp, healthy and safe.It works better with olive oil or cream. Corrective nipple depression,natural help with inverted or flat nipples,helping your nipple regain confidence. Clinically proven to help with inverted or flat nipplesAnd contains a replacement air valve. Suitable for pregnant women, mothers, etc. Attention 3 hours a day.When wearing a nipple appliance, you can apply some skin cream around the nipple to increase the suction of the appliance.Because the degree of nipple depression is different, the correction time is generally different, it takes about 2-3 months, please be patient. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.