Don't let the size fool you, the Podium Flow Belt 4 is a minimalist solution that doesn't minimize your storage. We've added extra room to our original belt so you can still carry your Podium bottle, plus all your essentials for your favorite ride or hike. - Includes a Podium Dirt Series 21 oz bottle - Air Support Back Panel with Body Mapping Technology for optimal ventilation - Secure zippered pocket, integrated carry pockets, and elastic pump loop - Reflective accents for better visibility in low light