These round covers are meant to give you a seamless look with a variety of tops, anywhere from thin crop tops to dresses with revealing necklines. Not recommended for sagging breast. Please note that 8cm more opaque has a thinner material than 7cm and 10cm more opaque. Product features: 1) Easy to use and seamless 2) Reusable and washable 3) Waterproof and sweat-proof 4) Comfortable How to wear your round covers: 1) Remove plastic film from the covers 2) Set aside the thin plastic 3) Stick your covers firmly onto your breast 4) Use the round covers for 8 hours per day 5) After use, stick the covers back on the plastic film and store inside your case Note: Hand wash your round covers with mild soap and running water as needed. Shade guide: Bare - fair skin tone Tan - medium skin tone Deep - dark skin tone Product material: Silicone Hardshell case material: PU Leather + EVA zipper Refill pouch material: Mylar (stretched PET) Inclusions for 1 order of round covers in hardshell case: 2 pcs round covers, 2 pcs plastic domes, 1 hardshell case, 1 care card Inclusions for 1 order of round covers in ziplock: 2 pcs round covers, 1 ziplock Color Disclaimer: The ziplock and round covers color might vary slightly because of photographic lighting and phone/computer monitor settings when viewing this listing. Sizing Disclaimer: This sizing information is provided as a guideline for sizing purposes. Variation tolerances of ± 0.7cm may be observed for the diameter depending on how the product is compressed or stretched out. Safety Disclaimer: Adhesive sensitivity differs per person. You may do a patch test first before using the product. If irritation, rashes, or allergic reactions occur, discontinue using the product immediately. Not recommended for breastfeeding moms.