The Atom Fluo backpack from Amphibious is a rectangular design in a bright fluorescent yellow for maximum visibility. Adding to the visibility are 4 reflective bands. The bag features breathable mesh shoulder straps for comfort that are also removable for using it as a tote bag. 4 D-rings are attached that enable you to carry or strap items to yourself with ease. This bag like many other items from Amphibious feature the roll down top with Velcro and closing buckles to keep your items water tight. Approximate Atom Dimensions (LxWxH):14.2" x 10.2" x 6"