The CamelBak Podium Flow 4 Hydration Belt is a minimalist belt for hydration. Drink when thirsty with the help of the included 21 ounce Podium Dirt Series water bottle, and carry tools, snacks, and even a packable wind shell if desired. The Air Support back panel uses Body Mapping Technology for ventilation and comfort when pushing yourself to the limits. The sustainable nylon construction is tough against abrasion and reflective accents provide increased visibility in low light situations.