This is undoubtedly one of the best microphone cables for live applications that I have come across! The sound quality is simply great, with crystal clear transmission and high quality shielding, and the Highflex (i.e. PVC sleeved) variety has the triple advantage of being (a) highly flexible, which is of course desirable in a live stage application cable, but also (b) quite sturdy, and (c) the least expensive (yay!) of the three SC-Source MKII flavours.
Yes: SC-Source MKII comes in three flavours, with the only difference being the sleeve material, which is either PVC, PUR or FRNC (see Wikipedia if you want more info on the materials themselves), with PVC being the most flexible of the three. FRNC is much stronger, verging on the indestructible, but this comes at a price of high rigidity, making this cable rather unsuited for stage work. The PUR version sits somewhere inbetween: it is quite stiff, particularly if one is used to the limpness of cheapo cables, but not unusable for live work. However, unless you are making up cables for daily use by a band called The Cable Eating Monsters, the PVC version will be quite strong enough.
Heartilly recommended!