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Does anyone know what the blue chest strap is for, supplied as standard along with a black chest strap which I am currently using?
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The Blue and Black straps are identical, other than the color there is no difference both are medium to double extra large size. They supply you with 2 straps in case you damage one you have a spare while you order another. I use the blue strap and let my wife use the black strap when we go to the track, I will do my sprints and when i am done, I…Read More