This case is very useful. Its only water resistant, so that just means you can't use it under water. I have used it many times in the rain while hiking and it keeps my maps perfectly dry. Its very light weight and flexible. Even though it's not water proof, I have used it in pouring rain and my map has stayed perfectly dry. Just don't go scuba diving with it and expect your map to be dry.
It also comes with Ospreys lifetime warranty, so feel free to put the thing to the test!
FeaturesOnce you place the map inside, it has a water tight zipper that closes it all up, then you can roll the whole thing together in a wound looking shape and store it away safely. You can also store it in a tri-fold shape if it suits your map better that way.
Material: 210D Mini rip nylon
Weight: 3.5oz (99g)
Manufacturer Warranty: Lifetime
[Rolled] 12.5 x 4 x 0.5in (32 x 10 x 1cm); [Unrolled] 12.5 x 10.5in (32 x 26cm)