Once you clip this to your wader harness, you will have everything you need at your fingertips. This little chest pack handles two standard fly boxes along with all of the standard ZeroSweep features. One ZeroSweep retractor station (great for nipper and floatant attachment), ambidextrous hemostat station, foam fly patch and tippet holder cover all your key accessories. ZS2 version now includes a molle modular attachment station allowing integration with ZS2 accessories.