I received this as a prize, but I won't be using it, so I'm putting it up for sale. Product Information This lightweight and compact muffler features high-quality down filling in a supple fabric with a subdued luster. It's highly packable, making it easy to carry around with you. Specifications Material: 20-denier nylon ripstop [water-repellent treatment] Insulation: 650 fill power down Average weight: 49g