Lightweight pump bag for the U.L. Comfort System, made of 20-denier ripstop nylon and water-resistant. - Brand: mont-bell - Product Name: Pump Bag - Material: 20-denier ripstop nylon (polyurethane coating) - Compatibility: For U.L. Comfort System series - Usage: For inflatable mats Thank you for viewing. Unused and unopened. I purchased it 3 years ago, but I will sell it because I will not use it in the future. Thank you.