Which revolutionary product packaging innovation transformed the map industry in the 1970s and is still used today for outdoor adventure maps?

Product packaging in the geography sector has evolved significantly over the years, with companies finding innovative ways to present maps, globes, and geographical data. One particular innovation changed how travelers and adventurers interact with maps. This trivia question explores a significant packaging breakthrough that revolutionized how people use geographical products in the field. Test your knowledge about this intersection of product design and geographical tools!

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Waterproof synthetic paper maps that could be folded thousands of times without tearing
Glow-in-the-dark map borders that allowed for nighttime reading without flashlights
Self-adjusting compass roses that realigned based on magnetic declination in different regions
Thermochromic ink that revealed hidden trails and landmarks when warmed by body heat