Holds either 100/140 round pods. Can hold up to a 20oz tank (can even hold a bigger tank). The wide/dual elastic straps aid in stabilizing the entire harness (it doesn't bounce on your butt), it stays put!!! With the tank to the side, you can bend backward without your remote sticking in your back, it is even out of the way when you lean to the side. Very, very comfortable!
A little expensive, $45+. Well worth it!!!
This is easily the most comfortable, easy to use, and most reliable harness I have tried. If you are going to use a remote, check this out!