Ventura PB0658/B 58 Liter Capacity Monza Panniers Saddle-Bags (Black) These are made of a PVC laminate backed ballistic material with internal seams reinforced, reflective striping and YKK zippers with pull tags Attaches with adjustable 2 inches Velcro straps to fit most seats D-Rings for added security and straps not provided Polypropylene supports to help retain shape Top opening zipper with storm flap