The Obalon Balloon System - Post-Approval Study is a prospective, observational, and multi-center study.

The Obalon PAS is a 1-year study that includes 6-month of Obalon Balloon therapy in conjunction of a weight loss behavior modification (WLBM) program and 6-month of continued WLBM program after balloon removal

Inclusion Criteria:

• At least 22 years old
• BMI of 30-40 kg/m2

Exclusion Criteria:

• Contraindicated for the device
• Use of medications or medical devices known to induce weight gain or weight loss within the preceding 6 months.
• Known history of endocrine disorders affecting weight.
• Participation in any clinical study which could affect weight loss within the past year
• Known history or present condition of structural or functional disorders of the esophagus that may impede passage of the device through the gastrointestinal tract, including, Barrett's esophagus, esophagitis, dysphagia, achalasia, stricture/stenosis, esophageal varices, diverticula, or any other disorder of the esophagus
• Life expectancy less than 1 year or severe renal, hepatic, pulmonary or other medical condition, in the opinion of the investigator

• Patients aged 22 years and older, who are considered obesity Class I or II with a BMI of 30.0-40.0 kg/m2; and, have failed to lose weight through diet and exercise
• Patients willing to commercially purchase the device.