✓ Funnel chest will cause serious thoracic deformity, causing different degrees of pressure on the heart and lungs, and it is easy to lead to introversion and low self-esteem, it is best to correct it as early as possible. ✓ Product parameters: Product name: chest vacuum clock Product weight: 1.5kg Corrective principle: external to change the shape of bones Product material: high transparent PC Applicable people: mild, moderate funnel chest patients (adults, children) ✓ Precautions: 1. It is not suitable to use the improved suction cup for patients with skin allergy, skin trauma, skin ulcer, bone tumour, etc. If you do not know your own situation, please use it under the guidance of a doctor. 2. The effect of product use varies from person to person, please follow the instructions in accordance with their own situation to use the appropriate amount, after receiving the product, such as size does not meet your needs, please contact customer service to exchange the required size.✓?Ttention!?: Our Suction Cups Are Customised According To The Size Of The Concave Of The User'S Chest And The Width Between Your Two Nipples, Please Be Sure To Contact Us And Provide Us With Your Measurements Before Purchase. ✓?Persistence?: Any Body Correction Needs Persistence, Non-Traumatic Correction, Without The Pain Of Surgery, Long-Term Persistence Will Make The Effect More And More Significant. ✓?Reliable Material ?:Our Suction Cups Are Odourless And Bpa Free, Your Family Can Choose With Confidence. They Are Washable, Easy To Clean And Maintain, And Can Be Used Repeatedly. ✓? Corrective Principle ?:The Funnel Chest Correction Belt Uses The Effect Of Negative Pressure To Non-Invasively Pull The Collapsed Sternum Forward, So That The Collapsed Sternum Is Attracted And Gradually Restores The Normal Shape. ✓?Funnel Chest Corrective Brace?: Used To Improve Funnel Chest, Depressed Sternum, Chest Depression And Other Sternal Deformities, Regardless Of Height, Weight, Thinness And Weakness, Suitable For All People To Wear, To Help You Restore Your Health.