It is a simple and functional bag, hard-wearing. It is easy to see the content and access it through its large opening. To close it, you roll it up and strap it: that makes the bag waterproof. The bottom is reinforced for heavy content.
Its adjustable middle straps keep the bag shut and the water out, the side straps allow for a quick volume adjustment (sturdy quick-release buckles). What's more, those straps are also used to carry the DUFFLE by hand or on the shoulder.
The bags come in two sizes, 60 L and 80 L. They are easy to spot, with the colours of the modern design: more blue for the 60 L version, more grey for the 80 L version, black for the reinforced bottom.