No more soggy charts. No more maps flapping in the wind. The NRS HydroLock Map Case helps you navigate with ease. Just fold your map to the right section, seal it inside, secure it to your boat, and go!FeaturesFour sizes to accommodate most maps, charts or books, as well as essentials such as wallets, snacks and a warm hatThe HydroLock zip seal provides a totally waterproof closureClear urethane window lets you see both sides of your map, chart or guideAttachment points in the corners make the NRS HydroLock Map Case easy to lash to your boat or a deck bag so it’s always right there when you need itSizing