The Lowepro Dryzone 100 is a heavy backpack - no getting around it. It's designed for maximum weather resistance, with a rugged, rubberized outer bag containing a heavily padded, removable insert. Also, it's bright yellow, so you'll always know where your bag is, even in the rain (though it should probably be on your back). In excellent condition, with minor cosmetic wear. Interior dimensions are approximately 10 x 30 x 23cm.