Another gimmick, Very poor sloppy fit from the picture, means more resistance with motion working against the dog.
How much does the gel weigh?
From my experience, ALL brand new vests do not fit the dog well. It's not until the vest is hunted in and begins to adopt the shape of the dog that it starts to look well fit and look like the vest works with the dogs movement. IMO, All brand new vest need to be broke in. I do not agree with calling the vest a gimmick.
My Disclaimer = I never even heard of the gladiator before this thread and know nothing about "gel" protection.