Map Case MediumMap Case Medium is a waterproof map case with internal dimensions 297x297 mm that fits maps in size M30. It is transparent on both sides and can be attached to your kayak or backpack. The map case is made of durable TPU material and is also touch screen compatible. Strong waterproof map case M30 with roll top closure Map Case Medium is made of a strong and durable 0. 3 mm TPU PU material with roll top closure and is waterproof according to IPX7. The