Yeah it is odd. I was looking at pictures of them earlier today because of the conversation on here about their general aesthetics yesterday. Bryer's clothing is very plain, as a general rule. He seemed to wear a lot of plain sweatshirts/jackets when he wasn't in camo. I think I only saw one thing he was wearing with a logo, also a sweatshirt.
Fewer pictures of Kam to work with, but even when you can't see exactly what he is wearing, the neckline almost always looks like a T-shirt. The only time I remember seeing him in a jacket is the "butterfly" picture, and his plaid jacket--which, incidentally, I have one just like that--is utilitarian but by virtue of having a pattern is still less plain than most anything Bryer wears.
I actually think that plaid jacket--or one similar to it--might also be in the background of Bryer's Slav squat picture on Instagram. But I am not 100% sure. It did make me wonder if Kam was sitting behind him on the computer while he was demonstrating his Slav squatting/bottle holding skills.
Edited to add: Or maybe Kam draped his jacket over a chair behind Bryer, and he's the one who took the Slav squat pic.