Small clutch purses and fanny packs that are 6" x 9" or smaller do not need to be clear, but can have no more than one pocket.
All other bags larger than 6" x 9" must be smaller than 12" x 6" x 12" and clear.
Hydration packs are allowed and do not need to be clear, but must be emptied of all liquid and with no more than two main compartments and one smaller compartment.