Totally disagree with the MD below, the highly cohesive gel implant is the 5th gen gel available in the U.S. Sientra has the only full line of gummy bear implants available. Allergan has a partial line and Mentor less. Sientra also has a round form and shaped form. The largest study to date has illustrated an excellent safety and patient satisfaction profile, better than the 4th generation implants. Take a look at the Sientra line, soft yet strong, you owe it to yourself.
Gummy implants are produced by the major US manufacturers. I am not a big fan of them because they are very firm, and are textured.