Is the Jardine Dukes Gear Pack duffel waterproof?

The listing describes the shell as waterproof, so it should handle rain and spills. Zippers and seams are the usual weak points on bags like this, so do not treat it as submersible.

Does it have a shoulder strap?

No. It is built for top-handle carry only, so plan on holding it by hand or adding your own strap.

Is there a shoe compartment?

No separate shoe or wet pocket is listed. Pack shoes in a bag or wrap them if you are carrying clean clothes.

How much does it hold?

No capacity is listed, but the square duffel shape fits a gym change, shoes and a water bottle, or a couple of days of clothes. It is not sized for a long trip.

Is it an official James Madison bag?

Yes. It carries James Madison Dukes team graphics, so it is aimed at JMU fans rather than a plain everyday duffel.

Can I carry it on a plane?

The square shape and top handles make it workable as a personal item or carry-on for a short trip. Check your airline's size limits, since no dimensions are listed.