Double Zippers Expand Bag From 17in. Long to 20in.. Made from 1680 D Ballistic Nylon & Water Resistant Polyurethane Fabric. High Vis Orange 900 D Polyester Interior. Hidden Zipper Compartment For Rain Cover & For Backpack Straps. Come With Four Straps That Allow For A Wide Range Of Mounting. Sewn on straps on the back of the bag for mounting to Sissybars. Straps With Side Release Buckles On The Top Of The Bag Allow For Additional Mounting Of Goods. YKK Zippers.