Celebrate half marathon runners with our running iPhone® case featuring our 13.1 Math Miles design that's an ideal running gift post-race or any occasion. The phone slides into the hard plastic shell case, which shields the sides and back from unintentional damage such as scrapes and scratches that can occur with regular use. Choose from a selection of sizes, designed to fit the most commonly available iPhone models for a great-looking case with a proper fit. No matter how you calculate it, a half marathon is a long run. Surprise a runner who just completed a race with this great running gift that's also perfect for birthdays, holidays, and other occasions.