If you're looking at this case, you are probably thinking that it's about 2 it 3 times the price of everything else map case related.
It's true, it is. But this case is so worth the extra. It is strong, flexible, completely water resistant, and compact. I mension compact, because some of the other cases are bulky - add an os map to it and they would be huge. Try fitting that into your waterproof pocket... With this holder, and an OS map inside, it easily fits in the pocket of my ME Ogre.
If you can find this holder for a good price on the internet, get it. It will latlst you for years.