The black part on the upper back is mesh. It's not flimsy nylon fabric, but a waterproof-like fabric similar to swimwear. There are traces of the name written on the tag being erased with a marker. - Brand: ATHLETA - Color: Black - Size: 150 I don't think there are any noticeable stains, but please understand that this is a used item before purchasing. If you purchase this item together with other items I have listed, I will offer a discount, so please leave a comment.