Had to pay to return it. TAKSTAR PRO-80 Id only use the carbinier to clip inside backpack/book-bag to ensure it doesnt fall out, but its nice its there. That being the case, not having sleeves and not compressing anything but the core (a little), doesnt make it a great workout shirt (very little compression). Thansk Amazon ???? Jai attendu de men servir près dun mois avant de mettre une évaluation afin quelle aide ceux qui (comme moi avant) doute de ce produit au regard du prix. It is a great replacement for the money and does exactly what it should! This is an upgrade over the previous generation, which used a more fragile micro-USB port. I dont foresee most people semi-permanently installing a bike rack to their hitch, so a hitch pin is more appropriate (and universal fit) and should be supplied. These are my favorites shoes to date.