SPIbelt, The Original Running Belt insoles The upper tongue has been

The upper tongue has been redesigned and is secured laterally with elastic mesh integrated into the lining construction to prevent twisting

They've been designed to increase vertical propulsion and extend stride length to help you reach a new personal best

Made for 60m to 400m track races

propulsive ride with high traction

SPIbelt, The Original Running Belt insoles The upper tongue has beenThe SPIbelt expands to hold larger smartphones; including the iPhone 13 Pro Max and Samsung Galaxy S20+. This fitness belt is called one of the best running belts for marathon runners, but its use doesnt 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 expands to carry what you need. Made