Functional in design with a focus on half marathon and full marathon runners. You ran it, wear 13.1 or 26.2 with pride, while being free from the hassle of tangled cables. Designer CableBuds weigh just 0.25 oz. and work with flat or round cables. All Designer CableBuds come with the 30 Day Money Back "No Risk Guarantee", thats because we are confident you will love them and the freedom CableBuds give you from tangled cables.