The vacuum bell uses a simple but powerful principle. A medical-grade silicone dome is placed over your sternum and a hand pump removes air, creating controlled negative pressure. This gently lifts the depressed sternum upward. You can see the lift immediately through the transparent viewing window during every session.

With consistent daily use (30 to 60 minutes per session), the costal cartilage connecting your ribs to your sternum gradually remodels into a corrected position. This is not theory. It works on a similar principle to how sustained, gentle pressure can gradually reshape tissue over time. In published research on vacuum bell therapy, structured programs documented improvement in a majority of studied patients, with outcomes ranging widely by starting depth, age, and consistency. In the Basel cohort about 80 percent of studied patients showed significant improvement. Results vary from person to person and are not guaranteed.

The key is consistency. Your chest did not develop this way overnight, and correction is a gradual process, but one that thousands have completed successfully from home.

No. This is the single most common misconception about vacuum bell therapy, and the one that stops the most people from starting.While younger patients (under 25) typically respond faster because their cartilage is more flexible, adults over 30 achieve meaningful correction as well. It simply takes longer: 12 to 24 months versus 6 to 12 months for adolescents.The real question is not your age. It is your consistency. An adult who uses the device daily for 14 months will outperform a teenager who uses it sporadically. Your cartilage is living tissue that responds to sustained mechanical force at any age.If you are unsure about your specific case, take our free 2-minute Pectus Assessment and we will give you an honest evaluation, including whether vacuum bell therapy is appropriate for your age and severity level.

The FormaChest Vacuum Bell comes in multiple sizes so the shell matches your chest rather than a one size fits all cup. To find yours, measure your indentation at its widest point: the distance in centimeters between the two furthest edges of the dip. Then add 3 cm. That total is your vacuum bell size.

On the men's line:
Size XXS fits totals up to 12 cm.
Size XS fits 12 to 13.5 cm.
Size S fits 13.5 to 15 cm.
Size M fits 15 to 16 cm.
Size L fits 16 to 17.5 cm.
Size XL fits 17.5 to 19 cm.
Totals above 19 cm we confirm by measurement.
The women's line offers Size S, M, and L on the same totals:
S fits 13.5 to 15 cm.
M fits 15 to 16 cm.
L fits 16 to 17.5 cm.
Anything outside that range we confirm by measurement.

The fastest way to get it right is the free assessment: it estimates your size from your answers and sends you the free guide by email. We confirm your exact size with a quick measurement before we ship.

You will see your sternum lift during your very first session. The moment you apply vacuum, the transparent window shows your chest rising. That immediate lift is temporary, but it is proof that the mechanism works on your anatomy.For lasting structural change, the typical timeline is: 1 to 4 weeks: the temporary lift holds for increasingly longer periods after each session 1 to 3 months: visible improvement that others begin to notice, particularly when lying flat 3 to 6 months: measurable depth reduction that persists between sessions- In published cohorts, non-surgical change is gradual, with many programs documenting visible reduction over a span of roughly 12 to 24 months of consistent daily use. Your own timeline depends on your starting point and your consistency. Results vary and are not guaranteed.
Your individual timeline depends on three factors: your age (younger = faster), your severity (mild cases correct faster), and your consistency (daily use is non-negotiable for results).The patients who get the best results are the ones who track their progress monthly with photos and measurements. We provide guidance on exactly how to do this after purchase.

No. The sensation is best described as a firm pulling or tugging, similar to a strong suction cup on skin. Most users find it mildly unusual for the first two or three sessions, then completely unremarkable after that.You control the pressure entirely. The hand pump lets you add suction gradually to your comfort level. There is no minimum pressure requirement to start seeing results; even moderate suction applied consistently produces correction over time.Some users experience mild skin redness in the application area after sessions. This is normal, temporary (fades within 30 to 60 minutes), and is simply a sign of increased blood flow to the area. Our Medical Sodium Hyaluronate Gel is specifically formulated for post-session skin recovery and keeps the skin hydrated between sessions.If you have ever worn a cupping therapy cup or had a medical suction device used on you, the sensation is very similar. It is nothing close to the pain of surgical correction, which typically requires opioid pain management for weeks.

We offer a 90-day money-back guarantee. If you use the device consistently and are not satisfied with your progress, we will refund your purchase. No fine print, no complicated returns process.That said, the clinical data is strongly in your favor. The landmark Swiss study (University Hospital Basel, 140 patients) found that 80% of patients achieved significant improvement. Only a small minority of severe or structurally rigid cases showed limited response, and those cases typically involve unusual anatomy that would be identified during our free assessment before you purchase.Here is what we recommend if you are uncertain: take the free Pectus Assessment first. It costs nothing and takes two minutes. If your results indicate that vacuum bell therapy is a strong fit for your case, move forward with confidence. If your severity or anatomy suggests limited likelihood of success, we will tell you that honestly. We would rather lose a sale than have an unsatisfied customer.We also provide ongoing support after purchase. You are not buying a device and figuring it out alone. You are getting a correction protocol, sizing guidance, and direct access to our team throughout your treatment.