Today, we'll be reviewing the Rola Platypus expandable rooftop bag with 15 cubic feet, part number 59100. This rooftop bag holds up to 15 cubic feet of gear. The bag itself is expandable from 10 cubic feet to 15 cubic feet by unzipping the bottom zipper shown here. The top zipper shown here is a zipper to allow you to open the cargo bag and load your gear. The hook and loop fastener, here on the… see more >