Marni Mohair is a type of wool goat breed. Their wool is very expensive, normally used for clothes and textiles. Kosher saying he has a wallet made out of mohair wool and he’s pulling out goat cheese (cheese obviously a double meaning for money, but goat cheese because of the mohair)
I love how u could almost make this up lol like it just makes to much sense like it so literal u almost know what it means but u have to google some stuff to confirm lol
He's wearing two beanies in this video. One says Marni on it. Looks like they make knit products. Mohair is a fine wool they get from a goat. Bringing it all together, he's spending money on some nicer hats.