The SPIbelt PRO is designed for runners who need a streamlined running belt that is able to carry larger running accessories on their outdoor adventures. Featuring a large, expandable zippered pocket, this belt is able to carry larger smartphones so you can stay connected no matter where you go! The low profile design of the belt helps keep weight off so you can reach your peak speeds and the sturdy buckle paired with adjustable elastic straps keep the belt firmly in place against your body reducing bouncing during your runs.