Once again, Kensui solves one of the weight vest issues that's always driven me crazy.
Weight vests need to be comfortable, which means they need to have padding. But that padding essentially becomes a torso sized sweat-sponge during a hard workout.
initially, Kensui sort of solved this issue by making the pad removable and washable (Thank heavens!) So you could at least wash it, but this takes the solution to the next level and beyond.
The pad is much more durable and supportive to improve comfort, while also preventing seat absorption so you avoid that sweat-sponge scenario. Thus improving comfort both ways, so you can focus your effort more into where it matters most, which is of course your training.