Versatile SCWINN Luggage Bag, Pannier Style, for Bicycle Rack Rear Carrier. Sturdy, versatile. Expands from basic single compartment to increase height by 4 inches Sides expand to bilateral pannier compartments with a simple zip. Straps at base to secure to rear bike rack(not included). Worked well for small space for overnight clothing or larger space for long trips. Very durable canvas like water resistant material. Original Owner. Se photos for condition details. I loved this bike accessory! Clip on for your keys so they don’t get lost. Carry strap to carry at end of day