The primary objective of this study is to demonstrate the safety and efficacy of the Elipse Gastric Balloon System for the treatment of obese adults.

This is a prospective, double-blinded, randomized, two-phase study to be conducted in a planned 400 obese individuals drawn from up to 15 sites. The treatment duration of the study is 48 weeks.

Inclusion Criteria:

1. Age ≥ 22 years and ≤ 65 years of age
2. BMI ≥30 kg/m2 and ≤ 40 kg/m2
3. Have signed study specific Informed Consent Form
4. Willing to comply with study requirements, including follow-up visits
5. Documented negative pregnancy test in women of childbearing potential.
6. Women of childbearing potential not intending to become pregnant for the duration of study participation. (Note: Women of childbearing potential must not be nursing at the time of treatment).
7. Fully ambulatory without any severe chronic orthopedic disease that requires reliance on crutches, walkers or a wheelchair that could preclude exercise during the study.
8. Confirmed unsuccessful attempts at more conservative weight reduction alternatives, such as supervised diet, exercise and behavior modification programs attempted within the 24 months preceding enrollment.

Exclusion Criteria:

1. Symptomatic congestive heart failure, cardiac arrhythmia or unstable coronary artery disease

2. Pre-existing respiratory disease such as chronic obstructive pulmonary disease (COPD), pneumonia or cancer

3. Previous bariatric or gastric surgery or likely to undergo during study

4. Use of an intragastric device prior to this study

5. Chronic pancreatitis or acute pancreatitis within 12 months of enrollment

6. History of or current small bowel obstructions

7. History of abdominal and/or pelvic surgery EXCLUDING only ONE of the following surgeries that was performed at least 12 months prior to study enrollment: cesarean section, diagnostic laparoscopy, laparoscopic appendectomy, laparoscopic cholecystectomy. (For example: if a patient has had 2 cesarean sections, or one cesarean section and a laparoscopic appendectomy, she would be excluded. If a patient had one cesarean section, she may be included)

8. Diagnosis of autoimmune connective tissue disorder (e.g. lupus, erythematous, scleroderma) or immunocompromised

9. History of genetic or endocrine causes of obesity not adequately controlled by medication

10. History of/or signs and/or symptoms of/or radiographic evidence of esophageal, gastric, or duodenal disease including but not limited to hiatal hernias greater than or equal to 2 centimeter (cm), paraesophageal hernias, inflammatory diseases, cancer, varices, diverticula, gastroparesis, ulcers, stricture/stenosis, achalasia and esophagitis

11. Insulin-dependent diabetes (either Type 1 or Type 2)

12. Significant acute and/or chronic infections of any kind

13. Severe coagulopathy, hepatic insufficiency or cirrhosis

14. Unable or unwilling to discontinue use of aspirin and/or non-steroidal anti-inflammatory agents (NSAIDs) at least 14 days prior to Elipse Deployment and continuing for 14 days after Elipse excretion

15. Currently taking the following medications (within 30 days prior to enrollment) and/or there is a need or anticipated need for these medications during the study:

    Excluded Medications:

    Systemic corticosteroids Anticoagulant therapy (e.g. warafin, dabigatran) or anti-platelet therapy) Immunosuppressive therapy (e.g. azathioprine, cyclosporine) Prescription or over the counter weight loss medication(s) Medications known to cause significant weight gain or weight loss Narcotics, opiates or benzodiazepines Insulin for treatment of diabetes Anti-seizure therapy (e.g. clonazepam, phenytoin) Anti-arrhythmics (e.g. amidarone)

16. History of pulmonary embolism

17. Has cardiac pacemaker or other electric implantable device

18. Anemia defined as either:

    1. Hgb < 11 for females, <12 for males
    2. Abnormal red cell indices and iron deficiency

19. Smoking cessation within 3 months of enrollment or plans to quit smoking during the study

20. Documented total body weight loss of ≥ 5% anytime 6 months preceding enrollment

21. Residing in a location without ready access to study site medical resources

22. Inability to walk 200 yards without assistance

23. Eating disorders including night eating syndrome (NES), bulimia, or binge eating disorder

24. Unwilling to refrain from any reconstructive and/or cosmetic surgery that may affect body weight during the study such as mammoplasty and lipoplasty

25. Current or history of illicit drug use or excessive alcohol use

26. Enrolled in another investigational study that has not completed the required primary endpoint follow-up period (Note: Subjects involved in a long-term surveillance phase of another study are eligible for enrollment in this study).

27. Any conditions that, in the opinion of the investigator, may render the subject unable to complete the study with a likely fatal outcome, or lead to difficulties for subject compliance with study requirements, or could confound study data.

28. Patient is not of sufficient medical health as determined by the Investigator to participate in the study.

29. Employees/family members of Allurion Technologies or any of its affiliates or contractors

30. Immediate employees/family members of the Investigator, sub-Investigators, or their medical office or practice, or surgical, bariatric or hospital organizations at which study procedures may be performed

31. An immediate family member (by marriage or blood relationship) of another subject already enrolled in the study

32. Positive breath test for H. Pylori

33. History of or current inflammatory bowel disease (e.g. Crohn's disease, Ulcerative Colitis)