Which details? On their description they just say the vest is leather. Not a word about the coat or belts. The "operation guide" says "Product material: Metal, Resin, PVC, ABS, Real Fabric, Wool, etc." Not a mention about leather, less specifically on belts or coat. Can't tell just from seeing mine if it's leather or pleather, really.
Also, I found this morning my Aragorn fell down from his base. Luckily he didn't suffer any damage, like my Joker did, but man, those magnets are far from the best solution for these figures. At least they should include a regular support option.
Some of the info from queen studios site
“For example, we chose suede for the trench coat to best recreate the texture of the costume while also considering the ease of care for collectors. It is durable and age-resistant.”
“The cloak is made of a light, thin, and drapey material, while the boots, belt, and other parts of the costume are all made of real fabrics, giving the figure more authenticity.”