Whether you're dinghy sailing or sea kayaking, the totally waterproof Kaituna Map Case will keep your maps safe, dry, & always at h&. The case is made from an ultra-clear TPU material. The roll-down seal will keep out any rain or mud, or spray on a kayak. The attachment strips mean you can use a neckcord, bungee, carabiner or webbing strap & attach this case to just about anything. The case fits Ordnance Survey, Trails Illustrated & most other popular map sizes