Derek is a man of his people, of his country. As such, he grew up facing the cold, harsh winters of Mont St. Grégoire, working away on the farm, escaping in the mountains whenever he had a shot. He developped a strong connection to the outdoor, which is reflected in how he dresses, in what he wears. I think you could categorize this as upscale outdoor bougee or something like that. Beanie? Check. Flannel over a t-shirt? Check. Rocking the climbing pants? Absolutely. Round it off with a well worn pair of glorious australian footwear legends, Blundstones, and you get the typical outdoorsy look that may not be specific to Quebec, or Canada, but that very much fits with the landscape and some of its culture. On other days, its full on fishing attire, extrapolated to make it look good. Hooké is a brand he loves and generally won't shy away from wearing, a Quebec brand, and coming to the game in waders is a usual thing, when the weather allows it, obviously with the appropriate head dress and glasses. All in all, gotta represent where you come from, make sure to never lose sight of what came before.