The HandiDuffel is a 135 litre cargo bag designed specifically to fit inside the HandiHoldall or to attach to the new HR20. For 2012 the HandiDuffel features a waterproof zip and is made from a high quality PVC material. Two HandiDuffels can fit inside a HandiHoldall roof box and one atop a HR20.

The HandiDuffel was introduced to satisfy a demand from HandiHoldall customers who wanted a separate storage solution that could be contained within our collapsible roof box. The HandiDuffel is manufactured from a high quality PVC material to ensure that it remains watertight. The HandiDuffel features grab handles on the top which makes placing it in and retrieving it from the HandiHoldall nice and easy. For added convenience and comfort when carrying,each HandiDuffel also comes with a padded shoulder strap.

Details here