The Topeak Wedge II Saddle Bag features durable 1000 denier fabric, a wrap around zipper and extra long 3M™ reflective strip for added safety at night. Mounts and removes quickly with Topeak's innovative QuickClick® system. Four sizes offered to exactly fit rider’s needs.Topeak Wedge II Saddle Bag FeaturesAdded Features: 3M™ reflective strip, Safety light clip, Rain cover for Small, Medium & Large sizes. (3M™ is a registered trademark of 3M Company).Bag Attachment: QuickClick® (F25) w/ seatpost strapExpanding: Medium and Large sizesMaterial: 1000 Denier NylonSeatpost Diameter: Fits 25.4 - 34.9 mm (Small, Medium & Large sizes)Topeak Wedge II Saddle Bag Capacity0 ... More info