Thank you for viewing! ( .ˬ.)" ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈ This is a very simple muffler, just thread it through a hole! I don't remember where I bought it. I used it for about 2 years. I used to wear it when I was a student, and it's great because the fibers don't stick to the uniform easily. If you have any questions, feel free to comment. : Instant purchase available Color: White系 (White-based) Pattern/Design: Solid Stains, tears, odors, etc.: None