Thule Chasm 40L duffel bag is a rugged, weather-resistant bag that can be converted into a backpack with shoulder straps that tuck away after use. Easy access to gear through the oversized, wide-mouth opening. The 2-in-1 design easily converts from a duffel to a backpack (backpack straps tuck away when not in use). Protect contents from the elements with the durable and weather-resistant tarpaulin fabric. Keep small contents organized and easy to locate with the internal mesh pockets. Prevent belongings from falling to the bottom of the bag in backpack mode thanks to external compression straps. Included carry case provides convenient storage and can be used as an accessory pouch inside the bag. Protect belongings from the ground thanks to the padded bottom. Quickly access small items in the exterior stash pocket. Easily lift in and out of a trunk or a rooftop box with oversized grab handles. Deter theft with lockable zipper pulls (locks sold separately).