Ha, that's funny, I think Etudes is the new name of Hixsept, a French streetwear brand from the late 90s. Every graffiti artist would try to launch a brand and get rappers and actors and soccer players to wear his tshirts back then. Like the more general French hip hop culture of the time, most of them have long disappeared. I don't think they really had the ambition to last more than a few years and the ones that remain, like Hixsept/Etudes and Homecore, had to evolve to remain relevant.
I can't really remember why, but the brand had a fairly bad reputation in the specific market they were trying to integrate. Maybe they weren't friends with the right people, or the guys weren't from the right place. My brother used to really be into these brands, I should ask him for stories.
No idea about the quality of the brand these days, but it's interesting to see how their products have evolved over 15 years or so.