Due to the unique construction of the non-woven polyester cloth, we are offering you a bag that allows air transfer, greatly reducing the chance of rust or mold production. Also you can eliminate the chance of cross contamination of DNA if bag is destroyed after use. This bag has no zippers to rust or scratch the firearms finish, on guns that are returned to their owners, this will greatly reduce your claims from damage. Security Reinforced at the top and bottom for long life. A small padlock can be placed thru the grommets allowing you the ability to lock the bag for transport to court. A pull tite seal can be used thru the grommets while the bag is hanging to discourage handling or tampering. Evidence tags can be attached directly to the bag or the bag can be written on directly with standard markers. RFID tags can also be placed easily on the bags. The bottom interior reinforcement also serves to stop leaks of solvents or oils. Low cost investment The original design of these bags was to a low cost one-use bag. As we have worked with the design in R&D we have found that the bags can be washed with a small amount of bleach in a standard washing machine at the Hot setting. This should destroy any trace DNA and allow you to reuse that bag. I have stopped the test at 25 washings and the bags still show no signs of wearing out. size is 9 x 54 to fit Long barreled shotguns.