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      When running long races, armbands can only hold your phone, are prone to slip, chafe, collect sweat, and makes one arm heavier than the other. SPIbelt is a more sleek, low-profile way to carry your essential race day items that’s lightweight and doesn’t bounce around. This makes it the ideal belt for marathons, or 5k, or 10k, or half marathons, and especially ultra-marathons where runners need to constantly refuel. If you’re preparing for a big run, whether you’re a beginner to a seasoned professional runner– we have the fitness belt for you.