Made of high-quality PP material, healthy and safe. Works better when used with olive oil or cream. Helps correct nipple depression and provides natural assistance for inverted or flat nipples, supporting the nipple to regain its shape. Clinically proven to assist with inverted or flat nipples and includes a replacement air valve. Suitable for pregnant women, mothers, and others. Recommended usage is 3 hours per day. When wearing the nipple device, apply a small amount of skin cream around the nipple area to enhance suction. Due to varying degrees of nipple depression, correction time may differ; typically takes about 2–3 months—please be patient. Package contains: 1 set of nipple correctors Contents include only the items listed above; other products are not included. Note: Lighting and differences in display monitors may cause slight variations in the color of the product shown in images compared to the actual item. Measurement error is +/- 1-3 cm.