Nobody likes having their movement restricted especially kids. That's why we developed the OBrien Youth flex V-back. We took all the features that everyone loved with our adult V-back Life jacket and applied them to Youth sizes. The kids couldnt be happier. With the segmented panels, Multiple front and side hinges, The split V-back stretch panel and wide armholes, kids feel unrestricted in this life jacket and parents are happy knowing that their kids are safe. Not only does the biotite outer provide a very comfortable feel, But is also lighter, dries faster and is more environmentally-conscious than traditional neoprene. On top of that, The full front zip closure and two concealed, adjustable belts make it easy to get into and dial in that snug fit to keep you secure and safe on the water. So if you are looking for the ultimate Youth life jacket for maintaining a maximum range of motion while still providing the safety needed on the water, you've found it with the OBrien Youth V-back. U. S. Coast Guard approved type III