Inclusion Criteria:

1. 22 years of age and older;
2. BMI ≥ 30 kg/m2 and ≤ 40 kg/m2;
3. Have a history of obesity (BMI ≥ 30 kg/m2) for ≥ 2 years;
4. Have failed more conservative weight-reduction alternatives, such as supervised diet, exercise, and behavioral modification programs;
5. Be willing to commit to a long-term supervised diet and behavior modification program designed to increase the possibility of long-term weight loss maintenance;
6. Be able to follow the requirements outlined in the protocol, including complying with the visit schedule;
7. Be able to provide written informed consent;

Exclusion Criteria:

1. Presence of more than one intragastric balloon at the same time;
2. Prior gastrointestinal surgery;
3. Has any inflammatory disease of the gastrointestinal (GI) tract including esophagitis, gastric ulceration, duodenal ulceration, cancer or specific inflammation such as Crohn's disease;
4. Has any gastrointestinal bleeding conditions such as esophageal or gastric varices, congenital or acquired intestinal telangiectasis, or other congenital anomalies of the GI tract such as atresias or stenosis;
5. Has a large hiatal hernia or hernia > 5 cm hernia or ≤ 5 cm associated with severe or intractable gastro-esophageal reflux symptoms;
6. Has a structural abnormality in the esophagus or pharynx such as a stricture or diverticulum that could impede passage of the delivery catheter and/or an endoscope;
7. Has achalasia or any other severe motility disorder that may pose a safety risk during removal of the device;
8. Has a gastric mass;
9. Has a severe coagulopathy;
10. Has hepatic insufficiency or cirrhosis;
11. Has any other medical condition which would not permit elective endoscopy, such as poor general health or history and/or symptoms of severe renal, hepatic, cardiac, and/or pulmonary disease;
12. Has serious or uncontrolled psychiatric illness or disorder that could compromise subject understanding of or compliance with follow-up visits and removal of the device after 6 months;
13. Alcoholism or drug addiction;
14. Unable or unwilling to take prescribed proton pump inhibitor medication for the duration of device placement;
15. Unwilling to participate in an established medically-supervised diet and behavior modification program, with routine medical follow-up;
16. Taking a daily dose of aspirin, anti-inflammatory agents, anticoagulants or other gastric irritants routinely and not under medical supervision;
17. Females who are pregnant, nursing, or planning a pregnancy within the next year;
18. Known to have, or suspected, allergy to materials contained in ORBERA™;
19. Participation in previous (within 60 days of study day 1) or ongoing clinical trial or current or past usage (within 60 days of study day 1) of investigational drug or device, or any use of an intragastric balloon prior to this study;
20. Genetically caused obesity;
21. Prior bariatric surgery or considering bariatric surgery during the study ;
22. Concomitant use of, or unwillingness to avoid any use of, weight loss medications, weight loss supplements, or weight loss herbal preparations;
23. Has a condition or is in a situation which in the Investigator's opinion may put the subject at significant risk or may interfere significantly with the subject's participation in the study.