Water-resistant UA Storm technology keeps your essentials dry|Expandable UA Speedpocket on back is water-resistant & keeps your phone secure, with no bouncing|Secure, zip front compartment to store your keys, ID, or gels-even fits up to an iPhone 12 Pro Max|Adjustable elastic webbing with buckle closure for a secure, custom fit|Reflective details on front & back for added visibility on low-light runs|Low-profile design for a secure, close-to-body fit|Uses a fluorine-free water repellent treatment