Great packliner perfectly shaped to fill the pack unlike other water proof bags. I would say its medium duty ideal for general walking and climbing.

I did not buy this to use as a packliner.If you plan to use it for a pack liner then a brighter colour would be better as you will be able to find things in your pack more easily.For my purpose it's pretty good.Light, cheap, packs small, waterproof, and tough enough for light use.I might even use it as an efficient carry on when traveling with restrictive low cost airlines.The reason I picked the Packliner instead of a normal dry bag is because this one is not round.