The osprey drysack waterproof liner is a perfect addition to your bag if you are wanting the content of your bag to stay dry safe and organised keeping all of your gear organised and protected is a concern whether adventuring in the antarctic or out hiking in a balmy summers afternoon osprey have designed a range of ultralight and tough drysacks specifically to help you achieve this made from siliconised ripstop nylon and in a variety of eye catching colours mean that you can trust theyll