Manufacturers have been trying for years to come up with a chart case that’s both waterproof and functional, and by golly Sea-to-Summit has done it. Their chart cases are designed kind of like a dry bag, with a roll down top. While other chart cases are notorious for falling a part just as soon as you start getting some use out of them, these guys kept our charts dry the entire trip, and with that kept us on track and from getting lost. We were impressed.
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