This is a multi-piece outfit which D'avin can be seen wearing in episode 6 of season 2.
It consists of a thick muti-layered custom made neck scarf, a gray sweater which appears to be a heavily modified branded sweater, a dark olive green vest branded OlympinA, a set of dark olive green overalls branded Dickies, these are extra padded and have some modifications to them including added embellishments to the shoulder. And lastly it comes with some some Rocket branded shoes.