This is a Harley Davidson duffle bag.  It's made out of heavy nylon woven fabric and is designed to slide over the back rest onto the seat or luggage rack.   It has a regular duffle bag strap, so when you arrive, simply lift it off and carry it in with you.   Measures about 20" long, 13" deep and 10 inches deep with the bottom expandable area unzipped to full depth.   Nice HD logo on side.   Reflective stripe to protect your back side.   This is perfect for an overnight or even a day trip in questionable weather.   As all Harley Davidson riding equipment, this is well built and ready for the road.

Very nice condition.  Minor wear.  No rips, tears, or odors.  Ready to use.