This LensCoat cover for my new 400/2.8 was perfect, even better than expected. It fits perfect on all aspects. Life is easier on my shoulder too! I give it 10 out of 10. I also use a hoodie I already had and my fav lens is wrapped up nice and sweet. If you don't have one of these $100 for your $12k lens, you are not thinking it thru. This is a winner!..