One Size Fits Most - By covering the nipples and using pressure to suction inverted flat nipples, a form suitable for breastfeeding is created.WEARABLE EVERY TIME - The size is similar to that of the nipple. It does not affect the appearance after wearing when wearing a loose bra and other clothes.Packs In PP Case - A set (2 pairs) of pp boxes, with a storage box, easy to carry and store for your daily life and travel. When one pair is cleaned, you can use another one at the moment.HYGIENE AND HEALTH - Using soft medical silicone material which can be sterilized in microwave oven. It reduces the load on the skin and is comfortable to use.ADJUSTABLE - Flexible adjustment of the force of attraction by compression. Easily find the best fit for your strength.About shlpping: All items will be shlpped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact usDuring the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shoppingThanks for your cooperation and we'll make you feel satisfied.