I've had both, the basic and the "pro" that attaches via harness with the removable insides. I bought both at the same time. The basic I used when swimming because I quickly realized the other filled with water and took a while to dry out. And although I wore the pro as my every day packer, it eventually wound up with a hole in the side. I honestly feel like it did because it was a solid piece. So to replace i just got a second basic. I love it. Feels great. Nice weight without being too heavy. I love the detail put into it. I won't use another packer than one by morme. Great company, high quality., long lasting, highly approved.