So I purchased a set of these 2 or so months ago, replacing my old pleather ear cups on the m50x. Picked them up in a pinch and got them delieved a month later. Probably the best fitting ear cups without having to purchase ear cups that are designed for other headphones. In terms of quality, second to none and doesn't change the fidelty and quality of sound which is amazing. Highly recommended and might buy a gray pair for my LE when it comes around again.