The SPIbelt® Monochromatic Pro expands to hold larger smartphones; including all current models of iPhone and Samsung. This fitness belt is called one of the best running belts for marathon runners, but its use doesn’t stop there. It is perfect for walking, working out, travel, medical needs, and so much more. Keeps all your exercise accessories, headphones, keys, ID, and credit cards safe, secure, and close at hand. The SPIbelt Monochromatic Pro expands to carry what you need.