Arkel's Map Case is waterproof, designed for easy reading of larger maps, goes on and off the handlebars in seconds, and offers the clearest map window anywhere. It’s also a mini-handlebar bag, with two stow-n-go pockets accessible while riding - just flip the map case over. The clear, durable window allows you to read maps up to 9 1/2 by 11 1/2 in. It attaches with reinforced Velcro tabs and detaches for added security so you can carry bike computers, bike lights etc. with you when leaving the bike for extended shopping.