Oltonar (Old Town's name for Uniroyal's Royalex laminate) Has a foam core with ABS plastic sheets on either side, selectively reinforced with more ABS where more strength is needed, and that is topped off with a vinyl skin inside and out. It was made in custom ordered pre-laminated sheets and vacuum formed into a canoe hull in one piece. The Discovery hulls, in contrast, were made from three layers of roto-molded polyethylene, a solid layer outside, a foamed core, and another solid layer on the inside. The Royalex/Oltonar boats were somewhat lighter. The most important thing to know about a Tripper is that they have a tendency to wear on the lower part of their stems if you are running over a lot of rocks with one. As a dealer, we would occasionally see one which had been worn all the way down into the foam core on the stem bottoms. This can be prevented with the addition of Kevlar felt skid plates set in epoxy resin. If you are running rivers and start to see some wear in those spots, get a ski plate kit before you wear through the outer skin.
