Endorphin Running Belt Marathon Training Sternum strap with whistle buckle

Sternum strap with whistle buckle

Features a mid-profile and a hook and loop closure

and enhances the delivery of oxygen and vital nutrients to the calf muscles for optimal performance and recovery

Plush heel and tongue for comfort and easy step-in

Endorphin Running Belt Marathon Training Sternum strap with whistle buckleThe Endorphin Running Belt was made to be your ultimate running companion. Light, secure, capable, and built to exceed expectations at every distance from 5k to 100 miles. Lightweight & Comfortable: Crafted from breathable, stretchable materials that conform to your body for a snug, bounce free fit. Adjustable Fit: An easily customizable waistband ensures a secure grip without pinching or digging, so you can move with confidence. Ample Storage: