[The rock bits are flakes, mostly, so it's not terribly heavy, but it is a little bulky. More rock-bits hang down from the hood to cover the face, too, so it obstructs vision a little.]
Just be careful; if you're up off the ground, the cloak stops working, since the bottom part isn't covered. ...with your fighting style, you'd better give me a pair of your pants and I'll sew rock chips into those,
That brings me to the next important point. You'd better have one, just in case we need to clear out in a hurry. Delphinus came by the other day with a warning from Messenger. They got caught taking something of King's and he knows. They know what we're doing now.
Then at the arena today, King tried to punish Persona for something- presumably for letting his influence be removed from the hearts of Ophiuchus members- and a few teams rioted to buy her time. He wasn't happy.