Breast forms stay in place using either a pocket bra, a skin-safe adhesive, or a combination of both. The method you choose depends on your activity level, whether you want to go braless, and how secure you need the form to feel against your body. Getting a natural look comes down to three things: choosing the right size, positioning the form correctly on your chest, and using the attachment method that fits your daily life.
Choosing the Right Type of Form
Silicone breast forms are the most common option because they closely mimic the weight and movement of natural breast tissue. If you’ve had a single mastectomy, a full-weight silicone form helps you feel balanced and stay level with your other breast. For larger sizes, lighter-weight silicone versions exist that reduce strain on your shoulders and neck. A form that’s too light can shift around or ride up throughout the day, so weight matters more than you might expect.
Foam forms are lighter and cooler against the skin. They work well for exercise, warm weather, or days when comfort is the priority over a perfectly weighted match. Bead-filled forms offer a middle ground: they mold to the shape of your bra and allow air to circulate, which helps prevent the sweaty rash that can develop behind a silicone form on hot days.
Partial forms are designed for people who’ve had a lumpectomy or lymph node removal rather than a full mastectomy. These smaller shapers tuck into your bra to fill in asymmetry and create a balanced silhouette. They’re also useful years after reconstruction if weight changes or aging have shifted the shape of your natural side.
Getting the Right Size
Your bra size can change with age, weight fluctuations, and medication, so measure yourself fresh each time you shop for a new form. Wear a bra and wrap a tape measure snugly around your body at the band line. If the number is even, add four inches; if it’s odd, add five. That gives you your band size.
For cup size, place the tape at the center of your bra cup (at the nipple) and extend it straight down to the center of the band. The difference between that measurement and your band size determines the cup. Most breast form retailers provide a conversion chart for this step. If you’ve had a unilateral mastectomy, the goal is matching the cup volume of your remaining breast as closely as possible.
Positioning the Form on Your Chest
Placement is where a natural look is won or lost. For a single mastectomy, the form should sit at the same height and projection as your remaining breast. Stand in front of a mirror and check that both sides are level before securing anything.
For a double mastectomy, you have more flexibility since both sides just need to match each other. A good starting rule: the forms should sit about an inch apart at the center of your chest, and the bottom edge of each form should line up roughly halfway between your elbow and your shoulder. That puts them in a realistic, proportionate position.
For your first few wearings, try placing the forms without adhesive and using a non-toxic washable marker to dot the top, bottom, and sides of each form on your skin. Those reference marks take the guesswork out of positioning until muscle memory kicks in.
Three Ways to Keep Forms in Place
Pocket Bras
A pocket bra has a built-in fabric pouch on each cup that holds the breast form securely. You slide the form into the pocket, and the bra does the work. This is the simplest approach and requires no adhesive, skin prep, or cleanup. It’s a good starting point if you’re new to wearing forms.
Self-Adhering Forms
These forms have adhesive built into the back surface. They stick directly to your skin, so the form feels more like part of your body rather than something sitting in a bra. Most self-adhering forms still need a bra for full support, but the adhesive keeps the form from shifting or riding up. One limitation: self-adhering forms generally can’t go into pocket bras because the adhesive sticks to the fabric.
Attachable Forms With Tape or Spray
Attachable forms have no built-in adhesive. Instead, you apply double-sided body tape or a spray adhesive to the flat back of the form before pressing it to your chest. This method gives you the most versatility. You can wear the forms braless with a strong tape hold, or skip the adhesive entirely and drop them into a pocket bra on days when you want something simpler. Some tapes are waterproof and sweatproof, making this a solid option for active days.
Preparing Your Skin for Adhesive
If you’re using any adhesive method, skin prep makes a real difference in how long the form stays put. Start with clean, dry skin. Shaving the chest area improves contact significantly. After washing, wipe the area with rubbing alcohol or witch hazel to remove soap residue, which otherwise creates a film between your skin and the adhesive.
Pre-packaged skin prep wipes are a convenient alternative. They clean the skin and leave behind a thin film that boosts adhesion for tapes and sprays. You can apply your adhesive immediately after using them, skipping the wash-and-alcohol step entirely. These wipes also reduce discomfort when you later remove the adhesive from your skin.
To take the forms off at the end of the day, peel them away from your skin slowly and carefully to avoid damaging the silicone. Remove any leftover adhesive residue right away using a product designed for that purpose. Apply the remover with cotton wool, let it dissolve the residue, then wipe clean. Leaving old adhesive on either your skin or the form leads to irritation and weaker adhesion next time.
Wearing Forms While Swimming
Standard silicone breast forms aren’t designed for the pool or ocean. Swim-specific forms are made from clear silicone that resists chlorine and saltwater and dries quickly afterward. These forms are shaped to let water flow freely behind them rather than trapping it against your chest, which keeps the form secure and comfortable in the water. Pair them with a swimsuit that has built-in pockets or a snug enough fit to hold the form in place.
Cleaning and Storing Your Forms
Medical-grade silicone is durable but vulnerable to oils, alcohol-based products, and harsh chemicals. Lotions, perfumes, and powders applied near the form can make the silicone tacky, discolored, or degraded over time. Keep these products away from the form’s surface.
To clean your forms, rinse them under lukewarm (not hot) running water. Hot water can warp the silicone over time. Use a gentle, pH-neutral, unscented soap like basic Dove or baby wash if you don’t have a specialized silicone cleanser. Rinse thoroughly until no soap remains. Let the form air dry, then store it in its original cradle and box, away from direct sunlight and sharp objects. Proper care keeps a silicone form functional for its full lifespan.
Insurance and Replacement Coverage
Medicare covers one external breast prosthesis per side after mastectomy, and two for bilateral mastectomies. Coverage lasts for the “useful lifetime” of the form, meaning you won’t be approved for a routine upgrade while your current one still works. However, if a form is lost or irreparably damaged (not just worn down from normal use), Medicare will cover a same-type replacement at any time. If your medical needs change and you require a different type of form, that’s also covered.
The biggest obstacle to getting claims approved is documentation. During the most recent reporting period, half of all improper payments for breast prostheses were due to insufficient paperwork. Make sure your prescribing physician documents the medical necessity clearly and specifies the type of form you need. Many private insurers follow similar coverage rules, so the same documentation advice applies.