SPIbelt Performance Series Size:Black/Black Zip The A360's wrist-based heart rate

The A360's wrist-based heart rate monitor measures your heart rate with flashing LEDs along the underside of the watch

making this fitness top an instant wear-on-repeat wardrobe addition

Personalized Comfort - Adjustable back straps and adjustable back closure ensure a perfect fit

Added Ventilation - Strategically placed perforation for ventilation

Zonal rubber placement for weight savings

SPIbelt Performance Series Size:Black/Black Zip The A360's wrist-based heart rateThis belt has been dubbed one of the best belts for marathons as it has elastic loops to place gels so that they are easily accessible. Not a marathon runner? No problem! This belt can be used by anyone who may have a use for the elastic loops! Clip on keys, pepper spray, etc. Weather resistant zipper and pocket to help keep essentials safe from the elements. Increased pocket size and four gel loops on the elastic band, you gain additional space to