The write in the rain note books have been used by the military for a long time. I have tested these note books in Canadian winters, summer heat, humid, and wet coastal environments. They have never let me down and even come in handy to use for labels that are inside water or alcohol for preserving insects. This Brand receives a Tough Gear Overall grade of an A++ and is highly recommended. If you don't want to pay the high price for a water proof pen, pencils work very well but do tend to smear more often. Ball point pens will start to bleed and run if kept wet long enough. As an outdoor scientist and recreationalist I highly recommend these products for field and everyday use.
