The Granite Gear StormShield Map Case fits either McKenzie or Fisher canoe country maps and is perfectly suited for attachment on canoe thwart bags, and portage packs using a hook and loop fastener. The StormShield is extremely durable because it's built with heavy-duty vinyl and 210-denier nylon. With its ziplock like closure, your map will stay dry within the Granite Gear StormShield Map Case. With bombproof reliability and durability, the Stormshiled Map case is the perfect companion for your next outdoor adventure. Get the Granite Gear StormShield Map Case and assure your Maps stay dry!