The all-weather Trekker pen writes on wet paper and upside down in temperatures from -30F to 250F. It’s 4″ long pen and has a flat Black metal barrel with comfort grip. The pen’s cap has a convenient ring to attach to a lanyard. Get one for $20.95 from Rite in the Rain. This site also sells special notepads that are specially made to shed water in any weather condition.
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