Pilot Study to Determine the Optimal Negative Pressure for Non-invasive Breast Augmentation in Women

Inclusion Criteria: 1. A woman over the age of twenty 2. A woman who wants both breast enlargement 3. A person whose difference between chest circumference and lower chest circumference is less than 10 cm. 4. Subject who sign the consent form of the study and agree to participate in the clinical trial 5. Subject who are willing and able to comply with study protocol Exclusion Criteria: 1. A woman who has a history of great weight-change 2. A case that Breast cancer or mammary tumour found in basic physical examinations 3. A woman with symptoms or history that suggest she has a fibroblastoma, breast pain, periodic congestion, etc. 4. A woman with severe trauma around the breast. 5. A woman with a scar or skin lesion around the breast. 6. A woman with more than breast ptosis of Grade 3 (the nipple is less than 1-3 cm below the breast) 7. A woman with a history of chronic dermatitis, chronic pressure urticaria, contact dermatitis, etc. 8. A woman who disagrees with contraception 9. A woman who has previously undergone a breast reconstruction or breast augmentation 10. A woman with an uncontrolled active infectious disease