This is a set of climbing compass and map case. Includes 2 dedicated carabiners. Features include: 1. Waterproof: Zipper at the bottom protects the map from water. Not suitable for diving, but it is sufficiently suitable for mountain climbing in mountains, snowy mountains, rainy days. (2) Functionality: The clear material on both sides is highly visible, so you can put a terrain map on the front and a climbing plan on the back. It is easy to use when you put a set of terrain maps, climbing topos and a back map of a street. 3. Portability: If you put it in a bag you wont be able to take it out immediately when you want to see it. Comes with a dedicated carabiner to eliminate the trouble of coming out of the bag. We have made it possible to use it when you want to use it outside or outside the harness. The carabiner hole of the map case is large enough to carry a climbing carabiner. Roll it up and fasten it with the included elastic band to form an elongated tube for compact storage. Easy to remove. Often included with a compass or map case and comes with a neck strap, but this product is not included in consideration of the risk of hanging from your neck and hanging on tree branches, etc.