Dry sacks are a great backpack accessory, protecting your clothes and other luggage items from the elements, whilst keeping everything organised and easier to find when you need it. This 3 litre ultralight dry sack from Osprey comes in multiple colourways and measures 22 x 16 x 14cm in size. Simply fill with the accessories or clothing you wish to protect and use the roll top closure to keep water out. Unlike other styles of waterproof dry sack, the Osprey ultralight dry sack comes in a rectangular shape, so you get more packing space and it can even stand unaided when removed from your backpack. As the dry sack is constructed from recycled ripstop nylon with a waterproof coating it is more than up to the task of protecting your clothes and accessories when travelling and at a lightweight 28g, you'll barely notice the extra weight in your backpack.