The Superwalker XT25 is based on original HARVEY mapping with all the information a walker would expect on a map at 1:25,000 scale. 2 Corbetts, 1 Graham & scheduled monuments shown. The format gives more mapping on the sheet without making the map heavy and bulky. The fold has been developed to allow you to open directly to any part, and either side of the sheet easily, no more struggling in the wind. The clarity of the mapping has been improved to enable more people to read it without their glasses. The map is uncluttered by information irrelevant to the walker. Less than half the weight of a laminated map. GPS compatible. Information on Canna supplied by the NTS Experience the satisfaction of fine navigation with the Superwalker XT25 now printed on our 100% waterproof and almost indestructible paper, whatever the weather!