You've impressed Bain, and that means that he will be giving you a mask from his own collection for you to use, free of charge. This mask is currently under development and will be added as soon as it's ready.
Meanwhile, deep in the Cloaked woods, behind the walls of Castle Beardfort, Almir was thinking; "This is going faster than anticipated... The PAYDAY community is too stronk. What if they reach past 1,5m? We would have to include new stretch goals... The master will not be pleased."