This is a holder pocket for weights that attaches to a belt. It feels really good to have this, as the weights don't press directly against your lower back. Especially if you have back pain, please give it a try. Also, it's easy to put weights in and take them out, so adjusting the weights frequently isn't a hassle. The weights can be secured inside the pocket with Velcro. And by tightening the Velcro on the pocket's flap, the weights won't fall out. In short, once you use this, you won't be able to go back to a regular weight belt. Think of it like someone who swore they didn't need a smartphone, but once they started using one, they couldn't live without it. This is really good! Diving Scuba Diving Scuba Diving Diving Equipment Diving Supplies Free Diving Skin Diving Snorkeling Free Diving