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Adjustable sternum strap expands for when you're breathing heavy
Improved performance
reducing hand and finger strain
working with a BOOMERANG FOOTBED to give you high levels of energy return
Dissolve one tablet in approx
Nathan Marathon Pak 2.0 - Black size-m11-w13 Adjustable sternum strap expands forRACE READYThis lightweight versatile training pak includes gel loops and a gel trash stash pocket so you can stay fueled while you keep pace. NEW ADDITIONAL STORAGEExternal stow away loop through design offers additional storage for shirt towel. POCKETS GALOREVarious pockets including front expandable stretch, compact and large zippered pockets to carry your smartphone and any other small essentials. External stow away loop through design offers