A running bag is a practical and convenient solution that allows you to bring your essentials to your workout and focus solely on your run. The interior pocket fits most phones. Space for your essentials to keep them close at hand. The adjustable waistband provides a comfortable fit and minimizes bounce while running. The reflective Nike Swoosh logo on the front increases visibility after dark. A key hook keeps your keys safe and secure. Technical specifications: Main fabric: 67% polyester, 33% nylon. Lining: 96% polyester, 4% spandex.