The 650 Sissy Bag is made high tech leather like vinylic material that is water proof and heavy duty hard case built with heavy thread. It has chrome plated brass studs on the lids. The top case is detachable with a heavy duty plastic quick release snaps to hold it down tightly. The 2 side bags are removable zipper bags. The main large case had a back rest with mesh lining for maximum comfort. On the back of the 2 main cases it has 2 velcro adjustable straps to wrap it on the sissy bar for optional use if you just need to use the top case for a short trip. It also has on the main large case straps for tieing down items if no passenger on back and a sizeable adjusting pin to hug and secure the bags to your sissy bar bag.