Sinew is the connective tissue of the Performance line; not the fastest thing we make, not the softest, not the most immediately impressive. It holds things together. Trilobal and bonded nylon spun separately and combined: two materials that have no particular reason to agree, doing so completely. It breaks in and stays broken in. It runs on a bearing responsive without complaint. Whatever you ask of it, it does, and it keeps doing it, and at some point that starts to feel like less of a feature and more of an obligation.